16315 : The limit price is worse than the trigger price
When placing a buying Stop Loss [SL] order, the trigger price entered should be lesser than the limit price.
When placing a selling Stop Loss [SL] order, the trigger price should be higher than the limit price.
If the above rules is not adhered to, the order will get rejected & the above error will be displayed.
The rules to be kept in mind when placing SL orders are - Buying SL orders can be placed only above the current market price, & selling SL orders can only be placed below the current market price.