Topic: Multiple strategy

Hi all, I'm trying to make a multiple strategy, running multiple strategies simultaneously. I think the basic strategy of fractals is perfect to begin with. I noticed that EURUSD works well in all periods of time, but by putting a spread of 30 pips, just comes to work well the daily fractal, incorporating logical conditions of entry (Alignator and ADX), improve results improve considerably but it really comes to over-optimization strategy, not working the same way in real mode. My question is, what strategies are best for periods less than a day?, Is there any way to filter fractals without falling into the over-optimization?