This procedure runs when a position is opened, closed or modified.
The procedure OnTradeChange has 2 parameters:
| 1) | Action: TDataModificationType – the type of change: |
a) dmtInsert – a position is opened
b) dmtDelete – a position is closed
c) dmtUpdate – a position is modified
| 2) | Trade: TTrade – the object from the TTrade class that was affected by the change. |
The objects Action and Trade can be accessed within the procedure.
Example:
Let us write a strategy that will output all the changes occuring in the Open Positions Window into the log.
The script will be as follows:
const StrategyName='My Strategy';
procedure OnTradeChange(const Action: TDataModificationType; const Trade: TTrade); begin Log('Some Changes were made in open positions table'); Log('Action: ' + IntToStr(Action)); Log('Trade: ' + Trade.Id); Log('Instrument: ' + Trade.Instrument.Name); Log('Account: ' + Trade.Account.Id); Log('Lots count: ' + FloatToStr(Trade.Amount)); Log('Close Rate: ' + FloatToStr(Trade.CloseRate)); Log('Position Tag: ' + Trade.Tag); end; |
As a result, the procedure OnTradeChange will run every time some changes occur in the Open Positions Window, and the information about the modified/opened/closed position will appear in the log.
As a result, the output may look something like this:
