I will second that. Having been a lucky investor in tech stocks early into the dot com bull, I gave back a small fortune from my 6 year run day trading for a living when my focus was on entry signals.
Evolved into trading 85+ instruments (futures, Fx, equities & ETFs) through a shorter, & two longer time frames applying a dozen different trading strategies. The 'edge' is from the risk/trade mgmt overlays,extensive experience as a multi decade discretionary trader, & consistency in executing the processes of trading. 10-15% of the trades account for most of the profits.