The worst thing about trading systems on price that has already occured

if you care to read on these systems for example gartleys, harmonics, fib lvls, SMAs etc they always try to force the pattern on price itself. Take say the gartley or the butterfly pattern for example. Notice how easy it is to either draw the M or W to form the bullish or bearish gartley or the butterfly on price that has already occured and then somehow find price that follows that trading method but when you do it on price that has not formed yet and that’s how we trade which is by trading on price that is due to move either up or down by our trade to make a profit suddenly price doesn’t follow the way the method says it should follow.