Is there a way to add custom asset allocations

One thing that you can do is use the security type field and customize its categories to whatever you want.  Do that from the Edit Security Details screen via a link right next to the type drop down box.

If you have mutual funds and want to use average cost, then first set the type to mutual fund(makes average cost box visible), and check the  use average cost box on the Edit Security Details screen.  Then you can change it to whatever type you want.

Of Course this won’t work with the  built in asset allocation routines as they are fixed  by the outside provider, but you can group  by type in portfolio view, etc. to get a sense of your mix by type.

HTH

I did not say that.  I said that you could use Security type as a way to track by the classifications you wanted to, and I pointed out it would not work with the existing asset allocation categories.   It was a workaround to the fact that you cannot add your own custom categories since the outside provider controls them.