Vanguard used to calculate dollar weighted performance for my investment account. Now they just calculate it for my IRA. It's such a simple thing they could do for all accounts.
They also used to have a nice Monte Carlo simulator. Their website utility has really declined while others like Fidelity's keep getting better.
It seems they are putting all their efforts into advisor services which is not in keeping with their history or of benefit to all investors owners.
Anyway, what's the simplest way to calculated dollar weighted performance without getting too in the weeds?