I just sent the following feature request to coinmarketcap:
Since there are quite a few non-volatile cryptocurrencies already in the existence, it would make sense to track their volatility against the currencies that can be selected on CMC for the price column. For example, by measuring the price amplitude during the past 24 hours you could get a simple volatility index which could then be used for sorting the table. As a result, people can see which non-volatile cryptocurrency is keeping their peg the best.