DislikedI'm sorry but you have no idea what you're saying. I strongly suggest that you read your post again. You just stated that spread is nothing to worry about. That's one of the biggest error people make when scalping. I proved that spread does matter, mathematically in my excel document. Where's your proof? Yes you do start of with a debt of -2 pips or whatever the spread is when you open a long position. If its a short, then the spread will be added when you close the position.
Spread is nothing to worry about.....wow.
Here's a typical situation...Ignored
If somebody is really going to backtest this system then he just needs to count that he was going to get 12-13-14 pips per trade not 10. And that's it.
And one more thing. With this system SL is not set beforehand. It means that exit (also our potential loss) is fixed only by market behaviour. If we count spread or if we are worried about it - it does not influence real situation and result at all.
I personally think that scalping contains smaller risks than trading longer timeframes. You just close your position manually in some minutes if their is a stronger move to the wrong direction. So, better is to start trading ASAP instead of endless backtesting.