KR20010055430A - Display apparatus and method for residual order of net buying and/or selling on higher ranked nominal prices in cyber stock trading system - Google Patents

Abstract

PURPOSE: An apparatus and method for displaying a remaining capacity of a genuine buying/genuine selling of the highest offered price of a cyber stock transaction system is provided for a user to forecast an instantaneous stock variation by calculating and displaying a plurality of the upper buying/selling nominal prices and total remaining amounts. CONSTITUTION: An exclusive emulator or a web browser is installed for making a plurality of client PCs(10(1), .., 10(N)) perform a cyber stock transaction through a communication network(20). After the exclusive emulator or a web browser is connected to a security corporation, if a user selects the current stock price for confirming the current stock price of a nominal price of a specific stock item, the current price searching key signal of the corresponding stock item is transmitted to a main server(30). A pure buying amount and a pure selling amount of the corresponding stock item inputted in accordance with the current price searching key signal and a plurality of the upper buying/selling nominal prices and total remaining amounts being changed in a stock exchange(40) in real time are displayed through the current price window. The communication network(20) connects to the client PCs(10(1), .., 10(N)), the main server(30) and a stock exchange computer system for a real time stock transaction.

Description

Display apparatus and method for residual order of net buying and / or selling on higher ranked nominal prices in cyber stock trading system}

The present invention relates to an apparatus and method for displaying a net purchase / net short-term remaining amount in a top price of a cyber stock trading system.

More specifically, in the case of cyber securities trading, the net buying / net selling amount for a plurality of the top selling price and the total remaining amount is automatically displayed along with the buying / selling bid price and the total balance displayed on the current price window that shows the hourly trading volume and the bid price of a specific stock item. The top issue of the cyber securities trading system for calculating and displaying the present invention relates to an apparatus and a method for displaying a net buy / net short-term remaining amount.

Recently, cyber securities trading, which enables users to buy and buy stocks online through a network communication network such as the Internet, has been gradually expanding with the explosive interest of various computer users.

As the interest of cyber securities transactions by computer users increases, each securities company is making great efforts to attract computer users who want to use cyber securities transactions.

As such, in order for computer users to conduct securities transactions on a network, a dedicated emulator for cyber securities transactions produced and distributed by each securities company must be installed on the user's computer.

At this time, the user computer must have a communication environment that can perform network communication such as the Internet.

After the installation of the dedicated emulator for the cyber securities transaction is completed, when the users execute the dedicated emulator to perform the cyber securities transaction, the user's computer is connected to the securities company's main server through the network, and then the user's key operation is performed. As a result, the desired stock can be bought or bought.

At this time, since the main server of each securities company is connected to the stock exchange, it is possible to perform stock trading according to the user's key operation in real time.

In addition, the dedicated emulator for cyber securities trading allows users to check the stocks of their interests (portfolio, portfolio), as well as the stock price search function, such as the current price and volume of stocks, as well as stock purchase and purchase. It also provides functions such as schematic information on stock price fluctuations and stock market information.

In addition, the above-described dedicated emulator provides a function of trading bonds such as corporate bonds in addition to general stock trading.

Meanwhile, as described above, in addition to the method of performing cyber securities transactions using a dedicated emulator, a method of making a securities transaction after accessing a web page of a specific securities company established on the Internet according to a user's communication environment and a web browser It is also possible to use securities trading using the built-in mobile terminal.

However, users of the conventional cyber securities trading system as described above could predict the stock price fluctuation of a specific stock item by looking at the current bid price displayed in the window, but the data display method of the top few (for example, 1 to 1). In this case, only the remaining amount of each bid and the total number of buys or sells are listed, but the net buy / sell price for the top buy / sell prices are not displayed. The inconvenience of using a calculator has arisen.

In addition, it is not easy for users to calculate the bid price due to the fluctuating price in real time, as well as the total buy / sell balance displayed in the window is not necessarily proportional to the top bid price. In the current market price, it was difficult to immediately determine whether there was a lot of sales or a lot of purchases.

It is an object of the present invention to automatically solve the above-mentioned problems, the net purchase / net selling amount for a plurality of the top selling price and the total remaining amount together with the buying / selling bid price and the total balance displayed on the window during the cyber securities trading. The top issue of the cyber securities trading system, which allows users to predict instantaneous stock price fluctuations by calculating and displaying them, is to provide an apparatus and method for displaying a net buy / net shortage balance.

1 is a block diagram schematically showing the configuration of the apparatus for displaying the net purchase price / purchase amount remaining in the upper and lower quotations of the cyber stock trading system according to the present invention;

2 is a block diagram showing in detail the configuration of the main server of FIG.

3 is a flowchart illustrating in detail the operation of the method for displaying the net purchase price / purchase residual amount of the upper price of the cyber securities trading system according to the present invention;

4 to 7 are flowcharts showing in detail the operation of each subroutine of FIG.

8 is a diagram illustrating an embodiment of a present price window according to the present invention.

Explanation of symbols on the main parts of the drawings

10: Client PC 11: Presently Windows

12: Price information display window 13: Transaction history display window

14: Buy / Sell Quotes and Total Remaining Display Window

15: Net Buy / Net Amount Display Window 16: Total Net Buy / Net Amount Display Window

20: network communication network 30: main server

31: data input unit 32: main control unit

33: database unit 34: communication control unit

40: Stock Exchange Computerization System

In order to achieve the above object, there is provided an apparatus for displaying a net purchase price / purchase residual amount of a cyber stock trading system according to an embodiment of the present invention, comprising: a network communication network which connects an unspecified number of communication lines to perform data communication with each other; Dedicated emulator or web browser is installed to conduct cyber securities trading through network communication network, and after the dedicated emulator or web browser is connected to the securities company, each user's current stock price and stock price among various stock items If the current price inquiry is selected to check, the current price inquiry key signal of the corresponding stock item is output to the outside. A plurality of client PCs displaying quantity or net selling quantity data through a current price window; In connection with the stock exchange computer system, various stock price data are input in real time, and according to the current price inquiry key signal inputted from a plurality of client PCs, the stock price data of the corresponding stock items inputted from the stock exchange computer system is displayed. Including a main server that calculates the net buy amount or net sell amount, and outputs the calculated net buy amount or net sell amount data to the corresponding client PC together with a plurality of the top quotations and the buy / sell total balance data input from the stock exchange computer system. Characterized in that configured.

In this case, the above-described main server is a data input unit through which a server manager inputs an operation program related to cyber securities trading and a calculation program for calculating net purchase / net selling amounts for a plurality of top buy / sell call amounts and total balances of a specific stock item. Wow; Controls the storage of personal information and stock account data of each cyber stock trading user, and when a key signal is inputted according to the current stock price of a specific stock item by a plurality of client PC users, computer information is calculated according to the calculation program inputted from the data input unit. Calculate the net buy quantity or net sell quantity for the plural top stock price and total balance of the stock items input from the system, and the plural top stocks of the stock items entered in the stock exchange computer system with the calculated net buy quantity or net sell quantity data A main controller for controlling the output of the call value and the buy / sell total balance data; A database unit for storing personal information and securities account data of each user performing cyber securities transactions under the control of the main controller; Outputs the current stock price data input in real time from the stock exchange computer system to the main controller, receives the current stock price inquiry key signal from a plurality of client PCs, and outputs it to the main controller. It is preferable to include a communication control unit for outputting a plurality of upper-order bid price, the total remaining buy / sell, and the net buy quantity or net sell quantity data to the client PC.

In addition, the method for displaying the net purchase price / net selling amount remaining in the upper price of the cyber securities trading system according to the present invention includes the steps of: accessing the main server through execution of a dedicated emulator or access to a web page; Outputting a current price inquiry key signal of the corresponding stock item to the main server according to the current price inquiry selection by the client PC user; Calculating a net purchase quantity or net selling quantity of a plurality of top quotations and total balances for the corresponding stock item in the main server through the current price inquiry key signal according to the selection of the client PC user, and outputting the net selling quantity to the client PC; It includes the process of receiving the net buying quantity or net selling quantity data of the stock price selected by the user from the main server and the total selling quantity of the stock item together with the plurality of top selling prices and the buying / selling balance, and displaying the current value on the window. It is characterized by.

Hereinafter, with reference to the accompanying drawings will be described in detail the apparatus and method for displaying the net purchase / net short-term remaining amount of the upper price of the cyber securities trading system of the present invention.

1 is a block diagram schematically illustrating a configuration of an apparatus for displaying a net buy / net short-term remaining price in a cyber stock trading system according to the present invention.

As shown, the plurality of client PCs 10 (1), 10, N are provided with a dedicated emulator or a web browser so as to conduct cyber securities transactions through the network communication network 20 described later. After executing a dedicated emulator or web browser to connect with a securities company, each user selects the current price inquiry to check the current stock price and the stock price of a specific stock item among various menus. Output to the server 30, the current is calculated in real time in the stock exchange computer system 40 to be described later with the net purchase quantity or net selling amount data of the corresponding stock items calculated and input from the main server 30 in accordance with the inquiry key signal The plurality of upper-selling / buying quotations and the remaining buying / selling total data are displayed through the current price window 11.

The network communication network 20 connects the communication lines between the plurality of client PCs 10 (1), ..., 10 (N) described above and the main server 30 of each securities company to be described later. Data communication based on the current stock price inquiry is made.

In addition, the network communication network 20 connects the main server 30 and the stock exchange computer system 40 to enable real-time stock trading.

The main server 30 is connected to the stock exchange computer system 40 which will be described later via the network communication network 20 to display various share price data which are changed in real time in a plurality of client PCs 10 (1), ..., 10 (N). ) And the corresponding stock items input from the stock exchange computer system 40 according to the present value inquiry key signal input by the present value inquiry selection of the plurality of client PCs 10 (1) and 10 (N) users. Calculates the net buy quantity or net sell quantity for the plurality of top bidding quantities and total balances, and calculates the calculated net buy quantity or net sell quantity data from the plurality of top bidding quantity and total buy / sell total balance data inputted from the stock exchange computer system 40; It outputs to the said client PC 10 (1) ... 10 (N) together.

At this time, as described above, the plurality of upper quotations used to calculate the net purchase amount or the net selling amount of the stock item is set to five purchase and sale quotation amounts in the embodiment of the present invention, but the present invention is not limited thereto. In addition, the number can be changed as needed.

In addition, the main server 30 described above is connected to the stock exchange computer system 40 in accordance with the stock trading data of a specific company input through a plurality of client PC (10 (1), ..., 10 (N)) After closing the sale of the corresponding stock, the stock-related data held by each user is updated and stored.

The stock exchange computer system 40 is connected to the main server 30 of each securities company through the network communication network 20 to provide various stock price data that are changed in real time to the main server 30 of each securities company. Handles stock transactions by multiple users through a securities company.

2 is a block diagram showing in detail the configuration of the main server 30 of FIG.

As shown, the data input unit 31 is an operation program for calculating the net purchase amount or net selling amount for the plurality of the top buy / sell quotes and the total balance of a specific stock item by the server administrator and the operation program related to cyber securities trading It receives the input and outputs to the main control unit 32 to be described later.

The main control unit 32 controls the storage of personal information and securities account data of each user using the cyber securities transaction, and the specific stock items by the users of the plurality of client PCs 10 (1) and 10 (N). When the current signal of the key is input through the communication control unit 34 to be described later, a plurality of the top call of the corresponding stock item input from the stock exchange computer system 40 according to the operation program input from the data input unit 31 Calculate the net purchase amount or net selling amount for the amount and total balance, and calculate the net purchase amount or net selling amount data, and the plurality of top buy / sell quotations and the total amount of buy / sell for the relevant stock items entered in the stock exchange computer system 40. The data is outputted to the client PC 10 (1), ..., 10 (N) of the user via the communication control unit 34.

The database unit 33 stores the personal information and the securities account data of each user performing cyber securities trading under the control of the main controller 32.

The communication control section 34 outputs the current stock price data input in real time from the stock exchange computer system 40 to the main control section 32, and outputs the data from the plurality of client PCs 10 (1) and 10 (N). When the present key signal of the current stock price of a particular stock is input, the corresponding key signal is output to the main control unit 32, and the plurality of top quotations, total buy / sell balance, and net purchase amount of the corresponding stock item are output from the main control unit 32. Alternatively, the net selling amount data is output to the client PC 10 (1),..., 10 (N) through the network communication network 20.

In addition, the above-described communication control unit 34 is connected to the stock exchange computer system 40 under the control of the main control unit 32 during the cyber stock trading by each user to control the input and output of the stock trading data.

Meanwhile, the present price window displaying various data of a specific stock item provided in real time from the main server 30 according to the selection of the present value of the plurality of client PCs 10 (1) and 10 (N) described above. 11, a price information display window 12 for displaying current / historical price data of the stock item, a transaction history display window 13 for displaying current transaction status data for each hour, and a plurality of stock items. Display Buy / Sell Quotes and Total Remaining Display window 14 for displaying the top Buy / Sell Selling Quotation and Buy / Sell Total Balance data, and the net Buy / Sell Selling Display for displaying the net buy quantity or net sell quantity data for a plurality of top bidding quantities. A window 15 and a total net buy / net sell amount display window 16 for displaying the net buy quantity or net sell amount data for the buy / sell total balance. Can control (see the accompanying drawing 8)

In addition, although the current is not shown in the window 11 of the accompanying drawings, the order button for selecting an order immediately on the window 11 and the graph information such as daily salary / weekly salary / monthly salary of the corresponding stock item may be checked. It can include a graph button, and top buy / sell traders for each institution.

Next, the operations of the apparatus for and method of net purchase / net short-term remaining amount display of the upper price of the cyber securities trading system according to the present invention configured as described above will be described in detail with reference to FIGS. 3 to 8.

3 to 7 are flowcharts showing in detail the operation of the method for displaying the net purchase price / purchase residual amount in the upper price of the cyber securities trading system according to the present invention, and FIG. 8 is a view showing an embodiment of the present price window of the present invention.

First, if a user who uses the client PC 10 conducts cyber securities transactions online and wants to check the net purchase amount or net selling amount for a plurality of top buy / sell quotes and the total remaining amount, they are developed by each securities company. A dedicated emulator provided by the company must be installed, and a web browser for accessing the web pages of each securities company established on the Internet must be installed.

As described above, when each user executes a dedicated emulator or a web browser installed on the client PC 10 to perform cyber securities transactions, the client PC 10 is connected to the main server 30 of each securities company through the network communication network 20. The connection proceeds to (S10).

That is, when a dedicated emulator or a web browser provided in the client PC 10 is executed by each user for using the cyber securities transaction, each user's communication connection is made to the main server 30 according to the set communication environment (S11). When the communication connection with the main server 30 is made, the client PC 10 receives the user login screen data output from the main server 30 and displays the user login screen data on the main screen so that the user can check it (S12).

The client PC 10 outputs the login data of the ID and password input by each user to the main server 30 through the login screen displayed on the main screen, and logs in the ID and password input by each user. The connection to the main server 30 is performed according to the determination result of whether the main server 30 is a regular user according to the data (S13).

As such, when the current value inquiry by the user of the client PC 10 is selected after the connection to the main server 30 of each user using the client PC 10 is selected, the client PC 10 determines the corresponding stock item selected by the user. The current price is output the inquiry key signal to the main server 30 (S20).

That is, the client PC 10 determines whether the current inquiry is selected among various menus used in the cyber securities transaction by the user (S21), and if the current inquiry is selected, it determines whether a particular stock item is selected among the various stock items. (S22).

Then, the current price of the specific stock item selected by the user outputs an inquiry key signal to the main server 30 (S23).

As such, when the current key of the specific stock item selected by the user in the client PC 10 is output to the main server 30, the main server 30 provides the current key from the stock exchange computer system 40 according to the current key. Among the various stock price data, the net purchase amount or net selling amount of the plurality of top stock prices and the total balance of the stock items are calculated and the calculation result is output to the corresponding client PC 10 (S30).

That is, the main server 30 receives various stock price data fluctuating in real time from the stock exchange computer system 40 (S31), and determines whether the current price inquiry key signal is input according to the user's selection of the client PC 10. (S32).

As a result of the determination, when the current inquiry key signal is input by the user from the client PC 10, the main server 30 checks whether the user has selected the current inquiry key signal of a certain stock item (S33), and displays the current price of the specific stock item. According to the key signal, the net purchase amount or net selling of the plurality of the top stock price and the total remaining amount of the stock items identified in the above-mentioned step (S33) among the various stock items inputted from the stock exchange computer system 40 of the above-described step (S31). The amount is calculated (S34).

The client PC 10 stores a plurality of upper-level bid and buy / sell total balance data input in real time from the stock exchange computer system 40 together with the calculated plurality of top-selling bid and the total balance. Output to (S35).

For example, in the main control unit 32 of the main server 30, as in the embodiment of the accompanying drawings, preferred stock price, first lane quotation, second lane quotation, three lane quotation, and four lane quotation, etc. Top five buy / sell quotes, respectively, and calculate the difference between the buy quantity and sell quantity, calculate TOP5 net buy quantity or net sell quantity, and output the calculated TOP5 net buy quantity or net sell quantity data to the client PC (10) The current is displayed on the net buy / net selling amount display window 15 of the window (11).

In addition to the above-mentioned TOP5 net purchase amount or net sale amount, the main control unit 32 calculates the total net purchase amount or the total net sale amount data, which calculates the difference in the total sale / buy amount of the current time, and outputs the same to the corresponding client PC 10. The current is displayed on the total net buy / net sell amount display window 16 of the window (11).

Accordingly, users who check the TOP5 and total net buying or net selling volume data can determine whether the stocks will rise or fall at the present time.

In other words, if the TOP5 net buying data is displayed, the price of the corresponding stock item will increase in the future. If the TOP5 net selling data is displayed, the price of the corresponding stock item will decrease. Will be.

Of course, the above-described case will be the most preferred embodiment, but the results are not necessarily consistent due to the characteristics of the stock market.

In addition, the TOP5 net buy amount or TOP5 net sell amount calculated by the main server 30 may be the net buy amount or net sell amount and the net buy amount or net sell amount of the five upper selling prices and the net sell amount for the total buy / sell total amount, as in the embodiment of the accompanying drawings. It is easy to see that it is not necessarily proportional, because there may be cases where the difference between the five top buy / sell quotes may be net buy even if the total buy balance is less than the sell balance.

Finally, when the plurality of the upper bidding quantity and the selling / selling total remaining volume data are output from the main server 30 together with the net buying quantity or the net selling quantity data for the plurality of upper bidding quantities and the total remaining amount through the above-described process (S30), the client The PC 10 receives the corresponding data from the main server 30 and displays the current data on the window 11 (S40).

That is, the client PC 10 includes a plurality of top-level bid price and buy / sell total balance data from the main server 30 together with the net buy quantity or net sell amount data for the plurality of top bid prices and the total balance of the stock items. 20, and if the net purchase quantity or net selling quantity data, the plurality of top bidding quantity, and the total purchase / selling total quantity data are input from the main server 30 as a result of the determination, the corresponding data is currently displayed in the window 11. Displayed on the user to be confirmed (S42).

As described above, according to the apparatus and method for displaying the net bid / net short-term remaining amount in the cyber stock trading system of the present invention, the current bid price of a particular stock item together with the bid / buy number and total balance on the window of the current stock price of a specific stock item Since net buying / sold is displayed on the market and the total balance, users can easily see the net buying / selling power at the current market price and set accurate trading timing.

Herein, while the present invention has been described with reference to the preferred embodiments, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.

Claims (8)

In the cyber securities trading system that allows a large number of users to conduct securities transactions online through a plurality of client PCs connected to the main server of each securities company connected to the stock exchange computer system, A network communication network which connects unspecified communication lines to perform data communication with each other; A dedicated emulator or a web browser is installed to perform cyber securities transactions through the network communication network. After the dedicated emulator or the web browser is executed to connect with a securities company, each user has a current stock price of a specific stock item among various menus. If the current price inquiry is selected to check the stock price, the current price inquiry key signal of the corresponding stock item is output to the outside, and the plurality of top bid prices and the total remaining buy / sell amount of the corresponding stock item input from the outside according to the current price inquiry key signal. And a plurality of client PCs displaying the net purchase quantity or net selling quantity data through the current price window. And It is connected to the stock exchange computer system receives a variety of stock price data that is changed in real time, and according to the current price inquiry key signal from the plurality of client PCs and the plurality of top stock prices of the corresponding stock items input from the stock exchange computer system; The main server that calculates the net buy amount or net sell amount for the total balance, and outputs the calculated net buy amount or net sell amount data to the corresponding client PC together with the plurality of top-level bid and buy / sell total balance data inputted from the stock exchange computer system. Top price of the cyber securities trading system, characterized in that configured to include a net buy / net sell remaining amount display device. The method of claim 1, wherein the main server, A data input unit for inputting, by a server administrator, an operation program related to cyber securities transactions and a calculation program for calculating net buy / net sell amounts for a plurality of top buy / sell call amounts and total balances of a particular stock item; It controls the storage of personal information and securities account data of each cyber securities trading user, and when a key signal corresponding to the current price of a specific stock item is input by the plurality of client PC users, the securities according to the calculation program inputted from the data input unit. Calculates the net purchase amount or net selling amount of a plurality of top quotations and total balances of the relevant stock items input from the exchange computer system, and the multiple of the corresponding stock items input from the stock exchange computer system together with the calculated net purchase amount or net selling amount data. A main controller for controlling the output of the upper bid price and the buy / sell total balance data of the; A database unit for storing personal information and securities account data of each user performing cyber securities transactions under the control of the main controller; And Outputs the current stock price data input in real time from the stock exchange computer system to the main controller, receives the current price inquiry key signal of a specific stock item from the plurality of client PCs and outputs it to the main controller, and outputs from the main controller The upper and lower quotations of the cyber securities trading system comprising a communication control unit that outputs a plurality of top quotations, total buy / sell balances, and net buy or net sell data of the corresponding stock items to the client PC. Remaining indicator. According to claim 1 or 2, The current price window for displaying a variety of data of a particular stock item provided in real time from the main server, Quote information display window for displaying the current / past price data; A transaction history display window for displaying current hourly transaction status data; A buy / sell quote amount and a remaining balance display window for displaying a plurality of top buy / sell quote amounts and the buy / sell total balance data; A net buy / net sell amount display window for displaying the net buy amount or net sell amount data for the plurality of upper quotations; And Net purchase price / net selling remaining amount display device of the cyber securities trading system, characterized in that it comprises a total net buy / net sell amount display window for displaying the net buy quantity or net selling amount data for the total remaining buy / sell. In the cyber securities trading system that allows a large number of users to conduct securities transactions online through a plurality of client PCs connected to the main server of each securities company connected to the stock exchange computer system, (1) proceeding with access to the main server through execution of a dedicated emulator or access to a web page; (2) outputting a current price inquiry key signal of the corresponding stock item to the main server according to the current price inquiry selection by the client PC user; (3) calculating a net purchase quantity or net selling quantity of a plurality of top quotations and total balances for the corresponding stock item in the main server through the current price inquiry key signal according to the selection of the client PC user, and outputting the net selling quantity or net selling quantity to the client PC; And (4) The process of receiving the net buying quantity or net selling quantity data of a plurality of top quotations and the total balance of the stock items selected by the user from the main server together with the plurality of top quotations and the total buying / selling quantity and displaying the current price on the window. Net purchase price / net selling remaining amount display method of the cyber securities trading system comprising a. The method of claim 4, wherein the process (1), (1-1) performing a communication connection to the main server by executing a dedicated emulator or a web browser installed on the client PC by each user; (1-2) after the communication connection is established, displaying a user login screen output from the main server on the screen; And (1-3) Through the login screen, the login data of each user's ID and password are output to the main server, and the connection to the main server is performed according to the official user judgment of the cyber server. How to display net buy / net sell balance in the top issue of the trading system. The method of claim 4, wherein the process (2), (2-1) determining whether an inquiry is currently selected among various menus by the client PC user; (2-2) determining whether a particular stock item is selected among several stock items when the current price inquiry is selected; And (2-3) The method for displaying the net bid / net short-term remaining price of the upper-ranked price of the cyber securities trading system comprising the step of outputting an inquiry key signal of the selected stock item to the main server. The method of claim 4, wherein the process (3) (3-1) receiving various stock price data which are changed in real time from the stock exchange computer system; (3-2) determining whether a current inquiry key signal is input according to the selection of the client PC user; (3-3) checking which stock item is currently the inquiry key signal when the present inquiry key signal is input; (3-4) The net buying amount or net selling of a plurality of top quotations and total balance of the stock items identified in step (3-3) among the stock items inputted from the stock exchange computer system in step (3-1). Calculating an amount; And And (3-5) outputting the plurality of top bid price and buy / sell total balance data to the corresponding client PC together with the calculated net buy quantity or net sell amount data for the plurality of top bid prices and total balance. How to display net buy / net sell balance in the top issue of the trading system. The method of claim 4, wherein the process (4), (4-1) determining, from the main server, whether the plurality of upper quotations and the total purchase / selling balance data are input together with the net purchase quantity or the net selling quantity data of the plurality of the upper quotations and the total balance of the stock item; And (4-2) Displaying the net purchase quantity or net selling quantity data, the plurality of top selling quantity and the total buying / selling remaining quantity data input from the main server on the current price window, How to display net selling remaining.