I would suggest, for a day trader, no interval of less duration than a 5 minute chart. I live on the 60 minute chart, I keep a 15 minute chart open, and on rare occasion drill down to a 5 minute or some increment of a tick chart. I never liked referring to these as different "time frames," though, of course, a 60 minute chart with 80 bars will cover a much larger time frame than a 5 minute chart of 80 bars.
That is very good. I understand what you are saying. I do not think of what I do in those terms, but I do enter where the necessary stop loss is small relative to the projected profit target.
I understand. Often, the 5 minute can be too granular depending on conditions (chop). However, in a fast moving trend (5% of the time), the 1 mins really shines...