Is there any way in Zerodha to use the trailing stop loss while buying/selling equities whose intraday price movement is less than 1 rupee. Currently it is minimum 1 rupee?

General
2

In bracket order the minimum ticker size is 20 or 1 point absolute for trailing. so, one point/rupee is minimum for bracket order trailing stoploss.

3

As of now the minimum trail is at Rs1 or 20 ticks, so you will not be able to use the trailing feature of bracket order. However you can place stop loss and targets for less than 20 ticks in bracket orders.

So if you are trading in stock with a Rs1 intraday range, then the software should allow you to put stop loss with 5 ticks or 10 ticks range too. Have checked this on my platform and seems to work.