The stock trading app allows traders and investors to keep an eye on stock price changes and follow the market news. Today we’ll tell you how we created a similar tool.
Defining Features
Our client works on the stock exchange. Thus, he described the desirable features of the future product at the very beginning of our work. To clarify, he was interested in the following opportunities:
- constant monitoring of the prices;
- graphing on asserted factors;
- pattern building for technical analysis of the market;
- notifications customization.
Price Smart Layout
In the projection process our developers thoroughly examined and analyzed the subject area. That made the communication with the client more efficient. Our team got a better understanding of the realization and improvement of the functional.
For example, our specialists found the problem of prices formatting in the trading app. The stock items can be evaluated in dozens of thousands dollars. But for cryptocurrency from 8 to 16 decimal points are used. However, even the smallest market fluctuations should be controlled and displayed properly.
For that reason, our developers created the customized function of regulating the asserted values. Their order defines how many decimal points should be displayed. For instance, if a stock item costs more than 10 000$, the cents are not displayed at all. But for the smallest values, by contrast, 4 significant digits are shown.
Built-in Aggregator’s Service
The existing aggregators gather and provide information about the financial quote, trading volume and news for the fee. That’s why we revealed the perspective of creating our own aggregator. Ultimately in our product, information is supplied from the aggregator’s server. It was developed by our associated group.
One more important aspect of the development of the trading app was the necessity to save the customized alerts and graphs on the remote server. For that purpose, we used the WebSocket protocol (the most suitable for the online applications at the moment). On registering, a user gets the access to his or her schemes and alerts even on another device.
Alerts Analysis Filter
Stock prices are screened online. Thus the massive stream of messages is created, that can activate an alert. But the checking of the conditions of each signal activation leads to overloading.
We developed the filter on the server side, that analyzes the alerts. It unites the lows and highs of the parameters and give way only to relevant events.
Server Interaction Library
The server part consists of three modules:
- server of data aggregation;
- server of alerts processing;
- streaming service.
The interaction is organized with the help of Action Cable Client Library and Action Cable Server Library. They make the connection and online data exchange easier. In order to get them, one should subscribe to channels of interest. For this aim the message with the keys for all monitored characteristics is sent.
Data Base Management System Selection
Aiming at the app productivity we also used Redis DBMS. It significantly reduces the database inquiry response time due to the locating certain amount of data in the internal device storage.
The described components work in the following way. Redis holds and updates the most frequently used files. All the information is moved daily into the hardware. That secures the flawless work of the program.
Result
The development of the tool for currency and stock markets is conjugated with many specific tasks. Nevertheless, the subject area research, as well as the study of new and perspective technologies let us presenting the requested project of high-quality, that corresponds to all the requirements and desires of the client.
Want to create a similar project? Then write to us, and we'll bring your idea to life!
