I want to place an order that starts as a limit order (to wait for a specific price), and then, automatically converts into a market order once the price reaches a certain predefined level (the trigger point).
chen wen
更详细的技术性描述（推荐用于与券商或开发者沟通）：
"The requirement is for an order type that initially functions as a passive limit order resting on the book. Upon the market price hitting a specified stop/trigger price, the order should automatically cancel its limit instruction and immediately become an aggressive market order to ensure execution."
关键点说明（可附加解释）：
This is not a standard stop-limit order, as a stop-limit converts into a second limit order, not a market order.
This is also different from a standard stop (market) order, which is dormant until triggered, without the initial passive limit order phase.
In essence, it combines the behaviors of: 1) Limit Order -> 2) Stop Price Trigger -> 3) Market Order.
补充说明（关于可行性）：
"This functionality is not typically offered as a native order type by most brokers. It may require implementation through conditional orders (OCO/brackets), a custom algorithmic script, or a two-step manual process (placing a limit order, then manually replacing it with a market order upon trigger)."