I find this work by Michael Hariss very interesting. I think his articles and blog posts are always very interesting and down to earth. I also subscribe to his journal. He uses his own indicator to time daily SPY moves and he is doing very well. Just google "Michael Harris SPY journal". For the free articles google "price action lab literature".
I just use same indicators to exit what i use to enter-havent found a better entry/exit system than that.