Just because you're getting your trades correct doesn't mean you can over leverage. It seems to be a human tendency. Recipe for disaster.
Example: The NRML trade I placed earlier in the day is going well, I get cocky and think of entering a few more positions, the next time it pulls back. I forget that my risk has crossed the limit. Also that it is 9 pm, no time for the trade to play out.
And then bang! It is a pullback, but on the higher TF, and my profits vanish, because I dont have funds to convert it into NRML.
I could've exited earlier, content with a smaller profit.