So people still don't know about these gems.. 
Yes, I was unaware of these exchanges. And I didn't know what MPEx was until I read this thread.
BTC-TC, LTC-Global, Bitfunder, MPEx and Havelock are the major five whereby LTC-GLOBAL a Litecoin exchange is. BTC-TC (www.btct.co) has the highest volume (30d avg 197k, daily avg 6.6k Bitcoin).
Is there a way to know volumes generated on other exchanges? Something like this would help: http://www.bitcoincharts.com/markets/
The charting situation is even worse. IRC trade feeds and coinflow are the only public tools I know of.
I do not trade anything that I cannot (i) first see on a high quality chart and (ii) then read and analyze the tape for selected points and ranges between them (to study what techniques are used by the big players for a selected instrument).
1. Do you trade on these exchanges?
2. Is shorting possible?
If you can get BTC-TC guys (do they have a representative on this forum?) to talk to tradingview guys (there is a representative on this forum) and in result get tradingview to chart BTC-TC instruments, I will in return give you a number of trading calls.