Don't risk more than .5%-1% on any trade and you won't have to contemplate why 1 stupid trade didn't work. Losses are part of trading.
Calling a top like the OP is pure gambling. There are reversal patterns (like the 1-2-3 setup) which at least have some statistical support. But just deciding that the market has gone far enough, and then using a fairly tight stop? That's donating money to the market.