Hello,

I don't see why using a 3D plot for a problem with only 2 variables (price, volume)...
unless third variable is time (but I'm not sure that it's what you are drawing)

In my mind it will be a much better idea to work on a Qt widget to display
candlesticks (like Highcharts Highstock) and also a Qt widget to display orderbook depth
Qwt could be help http://qwt.sourceforge.net/
or this project https://code.google.com/p/candelabro/
so it could be add to goxgui https://bitcointalk.org/index.php?topic=176489.0

On my side, I have now historical data M1, M5, M15, M30, H1, H2, H6, H12, D1, W1 data
for mtgoxBTCUSD.

I've done all the work to test if data are ok (no missing data, no overlapping data, constant timeframe)

I'm now working on a script to generate pseudo tick data (generate control points from candlestick).

I will release this soon...

Kind regards