The red indicator dipped 4 times below 20 during this correction, which meant I bought 4 batches of SPY calls. The first two batches almost broke even. The last two batches are showing nice profits. This is despite the drop in volatility compared with when I bought those calls. Overall a nice trade. But have to say the past few days made me nervous. Will hold over weekend and let them run. And since the red indicator has dropped nicely, as it typically does during an uptrend, it is now time to watch the blue indicator.