Price RSI (line),
- reading above 70% are considered overbought;
- reading below 30% are considered oversold.
Volume RSI (column),
- reading above 50% are considered bullish;
- reading below 50% are considered bearish.
Trade idea is to long on oversold and confirm with volume RSI that is trending from bearish to bullish region, exit on overbought and volume RSI trending toward bearish.
Vice versa for short trading idea.