Best way to find alts that hold up when BTC dumps and outperform when BTC bounces?

Is there a website/indicator/app that helps you track how alts perform when bitcoin is going sideways, going up or going down. ​ What I'm interested into seeing is if there's a pattern. I noticed that if certain alts dont fall that much when Bitcoin goes down, they tend to go up more once Bitcoin bounces. ​ Similar rule applies in other way. ​ It's hard for me to track this on the chart, best way I found to do it is to go on coinmarketcap and go on historical snapshot, but i

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