9079864256 & @Ramneet - I am assuming you mean this -
While the underlying is moving in your favor by 10% (as a example) trail it by 5% (again example)
But when it reaches 20% then trail it by 10% instead of 5%.
In my opinion, this is about locking in the profits for which there is a separate feature given in the strategy builder under Trailing Options - where you can lock the profit when it reaches a particular MTM and then trail with a different set of points.
However, I am not sure if the above feature "over-rides" the trailing percentage/points specified in each leg. Also the feature needs to have options for amount/percentage for Lock & Trail (I am assuming its a plain amount as of now).
