I want to create a custom symbol with Ensign ESPL, because the available choices for custom symbol types (in the Set-Up menu) is too limited for what I want to do. What I want to do is create a custom symbol for the dollar index, as my feed IB provides each individual currency quote, but not the USDX. The dollar index uses the following formula: USDX = 50.14348112 Ã (1/EURUSD)^0.576 Ã USDJPY^0.136 Ã (1/GBPUSD)^0.119 Ã USDCAD^0.091 Ã USDSEK^0.042 Ã USDCHF^0.036 This formula uses powers [^]. Is it possible to create such a custom symbol with ESPL? That updates realtime from the currency quotes? If so, how would I do it?