Nanex had an article on this subject. You can google it.
Apparently it has not killed scalping. I have been doing some in the past weeks and it is working beautifully. It could be new guy’s charm or luck. Definitely it feels much better than years ago.
My current strategy is based on 1 min and 5 min charts plus watching other longer time frames for bigger trends or pending price reversals. I’m also watching other major indexes and futures to sense overall markets.