Sure, here: http://manual.zorro-trader.com/trade.htm

Call enterLong(f), where f is your function that uses an incomplete candle for finding an entry. This function is called whenever a price quote arrives. The price() functions work as before, they are just in the middle of the candle now. When the entry condition is met, let f return with 2 to execute the trade, otherwise with 0.

Don't try this with normal strategies, though. Many indicators have wrong values when the last candle is incomplete, and using them for trade signals is not a good idea.