>>20685329intraday/intraweek highs and lows, VWAP, any level with a lot of trading volume, high volume icebergs on bookmap, 5/20/50/100/200 day averages, big round numbers (5000,5500, etc), or just any spot where there was a big reversal or failed breakout.
Many of these end up being the same numbers. I just go with whatever the vibe for the day seems to be and only make a big trade if it makes sense. Otherwise I fuck around with a few micros.