CryptoWatch is my go-to for monitoring crypto markets. It's easy to monitor the various coins available on assorted exchanges in one place from my CW account. Plus, their team is constantly shipping new features that are actually useful - excited to see what they have in store!
I've been using Cryptowatch for around 1 year and it has won me over in terms of technical analysis tools. It has a ton of features, a growing community of crypto and trading enthusiasts, and a fantastic team behind the build.
Tradingview was my go-to before but after getting my hands on Cryptowatch, there is no going back.