I backtested in 2 ways. 1. using
MT4 Strategy tester (always looking for a minimum 85% moing quality), 2. Manual backtesting (Up to 2 years). I didn't invest in Tradestation......
Every expert I ever wrote used combinations of fixed profits / limit orders / trailing stops etc etc. When tested on a
demo account in "live" mode, most experts would have a few winners, but the string of losers would soon follow.
I have one expert that contains about 25 pages of code, with almost every variable you can think of in use, but still no good.
I started by creating an ADX type expert, then moved to Macd, stochs, ema's, ma crossovers etc.
The most success I had was with mechanical systems - which is how I trade now but manually.
I'm not saying a winning expert cannot be written - but those who have are keeping tight lipped over it (and understandably so). Possibly a team of good traders who can code well could come up with something solid. If anyone out there is interested in this type of concept I would certainly entertain it.