Advancing - Declining issues indicator which you can use for Bitcoin trading if you, like me, believe that cryptocurrency is highly correlated with the activity on the stock exchanges (yes, the PROs are here, we just didn't know it yet)
This indicator is based on showing the data, as much as possible, as it is, and not messing it up by calculating stuff. Calculation should be used to better understand what the data represents, and not to show beatiful things which are, in fact, not present.
You could, for example, take ADVN and DECL, calculate rma() moving averages and make a RSI out of it. The result is very interesting when applied on the daily time frame, but not as useful for trading.