Outer disk:=DYNAINFO(23), internal disk:=DYNAINFO(22).

Internal trading refers to the number of active selling transactions, that is, the trading volume when the seller actively places an order to sell a stock at a price lower than or equal to the current buy one, buy two, buy three, etc. price.

Simply speaking, the external market refers to the number of active buying transactions. That is to say, the trading volume when placing an order to buy a stock at a price equal to the current buy one, buy two, buy three, etc., must be the buyer's initiative.