Of course exits and trade management are far more important than entries, that's why most lose: almost everything you see in books and on the internet is about entries.
The delusion is that the next trade will be a winner because a green candle happened on the 4hr in the past and the dog next door has started barking, and she's still at secondary school.
The traditional logic of triple screen is a great example of being delusional. Multi time frame strategies work - I use one but the traditional view of seeing something on 4hr, therefore something may happen on 1 hr then 15 min is delusion at it's best, if you see it on 4hr it already happend on 15 min and 1hr. The move may still go 'right' but the reasons behind it aren't what you perhaps think they are....they don't neccessarily have to be if you know past statistics and have some forward testing to gauge probabilities but don't kid yourself about reasons.
I have no idea if my entry criterea provides any edge over random entry but I know it stops me from overtrading, keeps me out of some choppy markets and with my trade management statistically gives +ve expectancy.
The 'logical' conclusion of R:R will lead you to lose too if you're not careful. 'I'm risking 10and for +ve expectancy I need R:R of 2:1 so my target is 20', so the trader sits there, sees the trade hit +9 and then retrace to -ve territory eventually hitting that -10 stop. Is it not better after seeing the +9 and starting to see price fall to get out at +ve a couple of pips and wait for the next trade that turns into a runner?
Oh but that's fear driving you says the 'logical' but perhaps delusional trader as his account drops another 10:innocent:
OK so fear gave us +2, logic gave us -10.
All a point of view, old boy.