Screen time is something every serious trader should adhere to religiously. However, subjective judgement on profit or loss exits is something I am really scared of. After screen time comes the book time, meaning keep on advancing the market reading skills after market close or end of trading targets for the day. At a real advantage are those who know trading software programming like TS and others.
I tend to do exactly the same thing. Internals set the tone for the day. It's not that they signal trades so much as they suggest whch way to lean and what kind of moves to expect.