Please allow stop order and limit order on position modification

The suggestion is for more casualty on modifying position, other than sitting in front of computer watching.

For example, I have 1 Lot of AUDJPY sell position, opened on 72.00. I want to add 1 lot more when price drop below 70.00. For now I could only watch it happen and then modify position manually. It would be great if a stop order for modifying position could be placed at this case. 

A limit order case could be I place 1 lot more to sell at 72.50.

I believe this could help a lot on position management. Hope that could be considered. Thanks.