I don't think as i'm not a discretionary trader so just respond...

I don't think as i'm not a discretionary trader so just respond to my indicators. XJO/SPI is a mean reversion, gap mean machine. So best is to find and apply filter which can measure the distance of the dip for example so that you would be able to quantify it and trade without thinking in grey, either white or black, no middle. This way you'll know the probability but this is tons of work, backtesting, programming if one can, etc etc, and nobody wants to do the hard yards, therein lies the market edges