A more advanced RSI tool with RVI, and Coppock curve, but also includes a daily short volume range, allowing to see the real net daily volume and find out it stock is being shorted more than usual.
Purple line is the short intensity. When below 0, it means the short volume is higher than usual (average of past 30 days)
Blue line is the RSI.
RVI is the cross line. Best practice for RVI is to sell/short when below -10 and buy/cover when above 10. I would use it with short intensity and RSI to be sure.
The red and green area is the Coppock curve. RSI and RVI might not be able to indicate long term trends, so use this to confirm your bias. The curve is bullish when above 0 and bearish when below 0. Be careful when trying to buy or sell it early when Coppock curve is falling. If it is falling and pops back up without reaching 0, it is typically indicate of a big price movement in that direction.