Fire a market order sized in the base asset when the market reaches activation_price. The trigger semantics match order_stop_market_place; only the unit of amount differs — here it is stock on a buy as well as on a sell.
Rate limits
Place stop-market order in stock
Request parameters
Response
The result object adds the conditional fields to the standard order object — see the order object reference. This method reports type 203, the stock-denominated stop-market code.
A buy spends quote currency at activation even though the order is sized in stock. The balance must cover amount multiplied by the best ask at trigger time, plus fee.
Error codes
Standard transport errors and the shared account, rate-limit, and region codes are listed in Order Management. 
