Make order expire after three candles

[azromero]

I would like to change my order time type to valid until next 3 candles from good until the end of day:

T.BuyLimit(LotSize, (ask-(45*_Point)), MySymbol, 0, 0, ORDER_TIME_DAY, Comments);

I tried this, but it didn't work:

T.BuyLimit(LotSize, (ask-(45*_Point)), MySymbol, 0, 0, ORDER_TIME_SPECIFIED, 3, Comments);

Does anybody knows how to do it? Thanks!

[Mahadi Hasan Razu]

You can add 3 candles time to your current candle time get your Custom Time for expiration. 

datetime OrderTimeSpecified = iTime(NULL,0,0) + (3*PeriodSeconds());

[William Roeder]

1. Note that some brokers do not allow expiration time.

2. There is no need to create pending orders in code.
   1. The pending has the slight advantage, A) you are closer to the top of the queue (filled quicker), B) there's no round trip network delay (filled quicker.)
   2. Don't worry about it unless you're scalping M1 or trading news.
   3. Humans can't watch the screen 24/7, so they use pending orders; EAs can, so no need for pending orders, have it wait until the market reaches the trigger price and just open an order.

[azromero]

Mahadi Hasan Razu #:

You can add 3 candles time to your current candle time get your Custom Time for expiration. 

Thank you for the solution!