I do watch 15min and sometimes 5min intraday charts to figure out how price acts around major support and resistance levels on an intraday basis. The two occasions where I always check intraday charts are both related to the momentum gap setup #MGS. Here I use them to evaluate if a intraday bottom is in by reading the price and volume signature. I also use them for the 15min Opening Range Breakout #ORB add-on signal. Other than that I avoid paying too much attention to every little intraday wiggle.