And you can't use RSI on small caps, only large caps, and even...

And you can't use RSI on small caps, only large caps, and even then you have to be aware that the trend affects how far the RSI can be stretched.

The RSI increase exponentially declines as the the SP increases, so it becomes meaningless with small caps that can double in price overnight.

Coming back to the issue of stock characteristics, it is noticable that some stocks have better predictors than others. For instance, RSI is very useful with Telstra. MACD for some reason is more predictive than trend analysis for BHP, which is odd given that MACD uses a greater number of periods to derive its oscillation, and so should lag more. MIG nearly always forms black candles, regardless of whether its going up or down.

That's why its useful to concentrate on studying a handful of favourite trading stocks and working out their characteristic chart patterns. If you can't work out the patterns and predictors, you just look for something a bit more reliable.