Look for 'invisible lines' where prices seem to gravitate and bounce around. I scan for low and highs to find double tops, support breaks, etc. Look at JBL's chart on the monthly. I managed to short the top because of it, for example, as well as CIEN. I also see seemingly random places where price bounces off of, but if you extend lines when charting, you will be able to see why they bounced off of those particular places.