This analysis indicates to me that ADA has been the best choice (among four of my favorites) for buying during the BTC dips - for the purpose of short term gains.
ADA tends to over-recover, at least briefly, and has gotten very tightly linked to BTC price lately.
For those interested, the technique for watching price as percent of ATH: multiply price by the reciprocal of the ATH/100. So MATIC ATH $2.71, Divide by 100 so chart shows percent = .0271. Then use 1/.0271 = 36.90 to multiply by price inside the ticker to get percentage of ATH. Multiple coins can then be compared in same pane on same scale over time. For some reason, Tradingview does not like division by small decimals inside the ticker, but does fine with multiplying; that is why I'm using the reciprocal.