Value When Keyword not fetching correct low value

Exit condition

Exit when LTP of Traded instrument < Low price of candle when close price of traded instrument cross below upper bolliger band ,
But from notification log it seems it out resulted out Open price not Low price.

Todays example:

It is Tradtron chart for 38900 PE

So after entry is taken then is cross over happens at 10:06 candle and close cross below UBB then it should store low as 272.50. But as per notication log it is stored price 315.40 which is open price for that candle.

Can you help me here?