$spx closes at 200 days highs on 20 day low range

On Friday the S& P 500 futures contract ES closed at another 200 day high. The range was 4.41 for the cash market, $spx, which was also the lowest 200 day range. The instances of this happening are very small, 8 over the last 15 years. To increase the sample size, below is a equity curve of strategy that goes short 1 of es when it closes at a 20 day high with a 20 day lowest range. The strategy exits at the short target, currently 1393, or at end of day.

28/40 or 70% of the trades are profitable, so looks to be a decent edge to be aware of.