Usually CFD traders depend on a trading system for all their trades. There are different types of systems available of which some are completely mechanical and can be customized and backtested. Also it is to be mentioned that not all systems are equally efficient.
A profitable system is a very important to have in CFD trading, it is especially more important since this trading derivative involves leverage. It is important to do some backtesting of your mechanical trading system considering you are staking your precious capital.