There are many rules to which you must adhere when day trading.
Some are basics that everyone must follow. Others are more personal edicts that help your personal trading.
Here I discuss one of my principles -- Take Your Trades...
As a day trader, you'll frequently be tempted to forgo your valid setups. As long as it's your setup and within your risk confines each day, you should take your trades. To do otherwise is to attempt the false art of predicting which of your setups will be winners and which won't.
That's a futile exercise.