Well, that just means that you personally could not find a strategy that works. Doesn't mean you are a bad trader nor does it mean that other people can't find those strategies.
I found something but this is not enough for me and the sample of 1 year is too small.
https://www.elitetrader.com/et/attachments/dd-png.166479/
https://www.elitetrader.com/et/attachments/cumulative-png.166478/