There hasn't been much action lately. It used to be 5 times a day or more, now not really.
I mainly check once a day mostly and then look at alt prices.
Seems there are few reliable exchanges now, which really sucks.
First, it was coinmarket.io, then it was mcx and vircurex and then mintpal and bter.
Mintpal was already problematic when they had their first couple million dollars lost. The second time everyone alreadyd had fair warning.