Indeed, in days such as this Friday, it seems easy to make money, the problem is that not every day is like that. The size of the market waves are not always the same and that is a problem. Sometimes you project what the market will do observing what you did previously, the problem is that sometimes, radically changes.
Move to jumping on trend / strength then the only thing that really varies is how much you make, I need quite a while well 5mins before I risk playing a bottom / chop reversal, most spike down and reverse fast so no way to call, other than big SL to allow for inaccuracy.