I do not use charts. not tape reading, based on the quote change (0.25 minutes refreshing rate) to make decision. normally I traded top gainers/top losers in the trading session, I do not trade a same stock over and over. it is very profitable. the advantage of no charts is that you filtered out lots of unecessary noise tick movement, and you do not see so called resiatance or support, the chart itself have no pattern there, but human nature is try to get some patterns from the patternless chart, this will consume your attention, without charts, if I feel not right, I just hit the button and run or take profit, if I feel it is rising, then I just buy, or vise visa.
I use time stop, not stop loss for day trading, so I do not need charts. I judge a trade wrong or right based on the RED time or GREEN time after I get in the position. this further filtered out lots of trapping noises.