About a week ago, the guys over at CryptoCurrency Market introduced their TaiFu(TM) Index which tracks the overall crypto market on an daily and hourly basis. They track the top 30 cryptos by market cap and give you charts showing their overall value, based upon an index that starts at 100. They also provide a concise list of the 30 cryptos and overall performance within the past 24 hours. I've started using this to summarize what's going on with prices in crypto as a supplement to coinmarketcap.com. I've found it a very helpful alternative and in some ways superior way of summarizing crypto prices. For example, in the attached screenshot, you can get a pretty good idea of the early morning crash, then the scale of the market rebound in the afternoon.
I suggest checking them out at http://taifuindexes.com/.