jcl,
I saw this in the beta trading.h headers:
#define GET_PRICETYPE 150 // type of prices returned by the API
#define SET_PRICETYPE 151
#define GET_VOLTYPE 152 // type of volume returned by the API
#define SET_VOLTYPE 153
As of this writing these are not documented - I look forward to it.
I assume that if I supply absolute or relative volume from the plugin, Zorro will already know how to translate this into the appropriate volume.
For example, if a user's historical volume is volume at that bar, and the plugin provides volume since the last brokerasset call, I expect Zorro to accumulate volume for every given bar. Are my expectations correct?