order expiration time?

[1mathboy1]

for the ordersend function, how does the expiration time parameter work? if I put in an integer like 5, does it mean the pending order will be canceled after 5 bars?

[William Roeder]

Per the documentation, expiration is a datetime - when the pending order expires. 5 is 1970 plus 5 seconds. (Not all brokers implement expiration.)