Be flexible in market movement do not attach to one setup only, Always take seriously your stoploss do not ignore your loss target.
If your back testing movement is accurate for 70% then also real market movement can wipe your 30% and you can have a big loss which will make your funds to 00.
When such situation comes where you make your funds 00, after that take gap for atleast 4-6 weeks to gain confidence as without stable mind you cannot trade properly.