Hi! I am trying to convert my custom data source into the following format (probably very familiar to you, its the tick firmat in QC): 

...
14400000,1674100,100,P,T,0
14400000,1674100,1400,P,T,0
14400000,1674100,100,P,T,0
...

The problem is i do not know what this format is. I,e what the column represents. My guess is this: 

14400000 = milliseconds since beginning of day
1674100 = price in cents
100 = volume 
P=?
T=?
0=?

plz advice or send a reference to your code base of mapping class.

Awesome platform! 

Cheers

Anders

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