Multi Execution Problem
Hi, I am new here, Sorry for the maybe stupid question.
I have backtested multi asssets simultaneously, one buy order was executed for multi times, like this:
2011-08-26, BUY EXECUTED, Size: 19500.00, Price: 5.00, Cost: 97480.50, Comm 1949.61
2011-09-06, 300206 Order 12 Status Submitted
2011-09-06, 300206 Order 12 Status Accepted
2011-09-07, 300206 Order 13 Status Submitted
2011-09-07, 300206 Order 13 Status Accepted
2011-09-07, 300206 Order 12 Status Completed
2011-09-07, SELL EXECUTED, Size: -19500.00, Price: 4.56, Cost: 97480.50, Comm 1779.18
2011-09-07, 300206 Order 13 Status Completed
2011-09-07, SELL EXECUTED, Size: -19500.00, Price: 4.56, Cost: -88959.00, Comm 1779.18
2011-09-07, OPERATION PROFIT, GROSS -8521.50, NET -12250.29
Through debug I found it is because asset 300206 has no data at the day 2011-09-06, when in 2011-09-05 the exit rule was met, it should sell at the next open price (which should be at 2011-09-06 ) .
When I backtest with the single asset, it works fine, for 2011-09-06 was omitted.
But when multi asset were used, the data were synchronized, day 2011-09-06 was added to asset 300206, but trade cant be executed. So strategy submitted a new sell the next day. And they all being executed.
I am not familiar with the mechnism, how can I fix this?
When multiple data feeds are in play, if others have data for
nextwill be called to let you know that some data feeds have advanced.
But the data feed with no data for
2011-09-06remains paused at
2011-09-05, because no new data is available.
You can control if a data feed has advanced by checking its
len(data). If the value remains constante the data feed is not advancing.