Since there isn't an index that specifically breaks out the top nine alt coins in regards to dominance I made this one up. TOTAL2 and OTHERS both look at large cap alts while excluding BTC but OTHERS excludes large cap alts and neither specifically looks at the top 10 excluding BTC. I chose baseline plot as candles had too much noise. I'll update this idea with weekly and monthly charts...
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Correction, 'TOTAL2 and OTHERS both look at alts' is what I intended to write.