why is candle not following the command?

[odohelijah]

i have a foundation idea and i want to use to it but discover the it is not following the instruction, i give.
the a idea is :
if candle one close is equal to =, Candle Zero open . trade opposite the previous trade.
who can help?

[l'andorrà]

How is the first trade of the sequence selected (buy or sell)?