I use https://explorer.zcha.in/ quite a lot to see what current network difficulty is, USD/ZEC rate etc. But I've noticed that the ZEC rate is incorrect. It currently shows $71.90 USD (which would be great if it was), but the actual rate from CrptoCompare.com is $62.08. You can see at:
However, https://Explorer.zcha.in uses the CryptoCompare API of:
to get the latest USD/ZEC price - but that is returning the wrong data - so not technically the fault of Explorer.zcha.in as to why it is not showing correct rate.
I've reported/raised this as an issue with CryptoCompare but not sure if/when they will fix it. So if you are looking (like I was) at https://explorer.zcha.in for the latest ZEC price, don't rely on it as it has inflated the figure by about 15% so your ZEC is worth less than you thought.