Best stock trading software for buying stocks. The best stock trading software doesn’t stop with in-depth research tools, analysis, screeners and spreads. Traders also need the best performing online stock brokerages in order to make the best possible trades. Most brokerages offer trading software, armed with a variety of trade, research, stock screening, and analysis functions, to individual clients when they open a brokerage account. In fact, the bundled software applications – which also boast bells-and-whistles like in-built technical indicators, Stock Trading Software is a type of software that is commonly used by day traders in the market. This type of software can do many different things for investors. Stock trading software is designed to analyze the market, open trades, close trades, and create a passive method of investment.