Here is the Sept RBOB Contract. Same idea with the double top. Note the RSI 21 showing the circled overbought levels at tops and oversold levels at bottoms. It's a good indicator for this overall. No holy grail but use it on a variety of markets to see it's consistency. It works great on some markets depending on a market's volatility and beta. They are all different. That is why you need to look at charts that go back 1 to 2 years to see what works and what doesn't 'most of the time'. Then look at shorter term time frames. Overall Gasoline is in a trading range and has been for a long time now.