It's a good point to always set a stop loss or target in every trader so that they will know about their loss, if your strategy will not work at once or twice, don't let it will happen next, find another one and try.  It seems to sound like trial and error but through this error, you should learn about it and apply it in the next session and avoid not will happening again.

I tend to agree with others there's no accurate trading strategies, all of them are speculating the market try to draw a conclusion which is only predicting the possible outcome but in fact, it's unpredctable and no really knows what will happen next.