Traders can set up rules for long position trade like using 50 days moving average crosses over 200 days moving average on a trading system. Allowing users the feature of selecting the type of order i.e., Market or limit along with the time window of frame of the trade to be executed.
However many traders opt to use their own custom technical indicator strategies by working with programmers to develop a system. Though this approach needs more hard work than system defined wizard and in return, it rewards the traders by providing much more flexibility and results can be more promising. Again I would like to remind you that there are no given strategies that assure 100% success.
Once traders and programmers are done with establishing trading rules, the computers start analyzing the market for buying or selling opportunities defined by the trading set of rules. As soon as a trade is executed, the system automatically starts generating protective stop losses, trailing stops, and profits strategies. In this dynamic market, this instant entry or exit point can mean a difference between a small loss and a dreadful loss, when the market turns against the trader.