When using bitcoincharts.com which market most closely resembles coinbase?

[beamin]

I use coinbase pro and would like more access to charts then their limited interface but they dont list coinbase in their list of charts/prices. The closest I found was "bitstampusd" seems to be very close but not exactly.

I used to use coinigy but I cant justify the monthly price due to how little im trading and dont understand half of it anyways.

Whats a good site to use to see technical charts when using coinbasepro?