It is very simple as you say. Delta will do three primary things REALTIME for a trader (had to thrown in that REALTIME for riskfree....LOL!);Quote from Insearch:
Unless, I'm missing your question, that is the fundamental of his method . . . I think . . . isn't it . . . but this was obvious from the first few posts of this thread, no?
1) Delta can be used to find zones of resting inventory (resting supply)
2) Delta can be used to REALTIME visualize initiated buying or selling and measure the conviction within the order flow (demand)
3) Delta can be used both intrabar and cumulative to find divergences with price
If you can learn from the Delta information these three simple fundamentals, you then have imo an edge!