Currently there is no Pre/Post market chart data. This is largely due to the fact that when these charts were developed, they were not developed with that capability.
This is very high on the "To-Do" list, and as a matter of fact, we're currently developing new charting to do just that, as pre-market charting is in very high demand. We don't have a strong ETA at this time, but we can assure you that everyone will be notified when the new charting comes around.
However, You can still place trades during pre-market.
If you are entering a trade pre-market using hotkeys it should allow the trade to go through. If it is getting suspended, let me know as this is an issue we will need to fix.
If you are entering the order into the trade ticket manually you will need to select either "Pre-Market Only" or "Pre-Market and Regular" under the "Extended Hours" drop down within the trade ticket window.
And make sure the Duration timeframe is GTC instead of Day.