I wouldn't know how it would work on AAPL. It's not that I wouldn’t want to have an opinion.
One reason I can't say anything is because I don't have a functional backtest set up yet.
Another reason is that I wouldn't trade it anyway because I am only interested in trading ETFs because they represent many stocks and are therefore not as sensitive to company-specific news events.
A third reason is that I prefer going both long and short a market sector without actually having to go short. That can't be done with individual stocks, but can with the Ultra ETFs.
A fourth reason is that both Financials and NDX have a relatively small number of identifiable companies that represent a large fraction of the value of the their index, so it is easy, and doesn't take much download time, to gather information on each company in those groups for purposes of generating additional indicators in a similar way that Les does.
Indirectly, I trade AAPL because it is in the top group of NDX companies; but that's as close as I want to get to it. That fact begs the question: why are you interested in trading AAPL and not trading QID/QLD, which are derivatives of NDX, because you say NDX is too narrowly represented by the top ten (or eleven) stocks? To trade AAPL and not NDX derivatives (QID/QLD) seems inconsistent to me.
You wrote: Maybe you also got a SELL at the close?
Do you mean on AAPL, or one of the Ultra funds I am trading?
Market Data 
Markets 
AI
