There are hundreds of systems posted in this forum, and when I look through the threads I wonder how people develop and test them. When I backtest a system that is described here, I often find - with one remarkable exception so far - that it is unprofitable. Yet people seem to trade them apparently unconcerned if they win or lose in the long run.
When you read the description of a system here, how do you decide if you want to trade it or not? Do you go through price charts and manually simulate trades, adding the results in a pocket calculator? Or do you just trade away when you like the rules?
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