Past like the first 30 minutes? How about buying the high every time there's a new high? This method would only lose money when price makes a new high and then drops under it. The method would only lose money on days that look like this /\ true?

why everyday? why do you have to exit at the end of the day?
day trading is for cowards who can't handle any risks. grow a pair... look at long term charts... why exit at all?
Past like the first 30 minutes? How about buying the high every time there's a new high? This method would only lose money when price makes a new high and then drops under it. The method would only lose money on days that look like this /\ true?