jychiu,
The Tickvalue in TS(EL) is computed as MinMove.
MinMove/PriceScale gives the Minimum Tradable tick for any instrument.
So, you can have MagicTick input to allow users for 1, 2,3... magicticks.
Then have a variable: MT(0);
MT = MagicTick*(MinMove/PriceScale);
...