I hope this not too off topic but here is a brief synopsis of parts of Tom Hougaards book -
‘BEST LOSER WINS’
Tom talking to a CEO of a large London brokerage -
Tom; How can you tell if someone knows what they are doing?
CEO:1 Account size
2 Trade frequency
3 Ratio of time spent holding losing trades versus holding winning trades
4 Adding to winning trades or adding to losing trades
5 Trading with a stop loss.
I emphasised point 3, we have an important psycholgical point here. It’s human emotion to hold losses in hope of them turing good and we cut our winners short out of fear of having our money taken away.
Across the board brokers have to publish % of losing traders and it’s about 80% BUT they fail to add that traders are having about 60% winning trades.
So that old adage - ‘Cut your losses and let your winners run’ is TRUE
Sorry, back to thread - My daily drawdowm as a 5min/1min trader would be 20pts Nasdaq (2%) but if I think 'oh well that’s just a losing trade ok - three such losing trades and I would consider - is it just a bad nun is the market not liking me today and not suiting my style or is it just plain me not firing on all cylinders? Either way I would pack it in for the day as these days have a bad habit off getting worse! Small losses are easy to get back but don’t let yourself get in a hole. I use a tight SL but that’s one advantage of being a scalper 
In the unfortunate instance of a big drawdown over an extended period - bank/equity in account down, once 30% of bank is depleated I would start again ie reduce stake to 1%/2% of remaining bank.