Hi @Roy Welcome to MadeForTrade community.
We had explored that earlier, and skipped the thing as there are issues about data / records how various entities store and manage them; and could result in errors or wrong scrips being added. For a trading platform, these mistakes even if they happen on user’s end via an over-sight could have terrible results.
We recently added ‘Build Watchlists Faster’ feature on Dhan - which is now widely used for building watchlists. You can read more about this here - Introducing Fast Watchlist: Now Build Watchlists on Dhan - 10X Faster!
In addition to this, a very cool feature is in works - which will be even better. We are testing this out, wait for same!