Hi Tanvir,
You can create a Macro to do it.
We had a similar requirement and we created a macro executed after the SNP at an aggregate level (for all the plants). This macro checked if there was an overstock situation by comparing the actual days supply vs the target days supply (this target days supply was a fixed value defined for the all the region).
Then when we found an existing overstock, we balance the stocks levels by creating a stock transfer order between the location with overstock and the location creating replenishment orders... Finally, we re-run the SNP. You can maybe follow a similar approach.
Kind Regards,
Mariano