Custom quote for OTC broker

Hi,

I am making a BTC-ARS (ARS is Argentina Peso) OTC broker and I want to quick trade to calculate the price based on this logic:

  1. Get the price from Binance BTC-USDT
  2. Multiply it by a static value I input for USDT-ARS

Additionally the second quote changes from time to time so how do I update that?

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