Why wasn’t my market conditional order filled after it was triggered?

When a conditional order is triggered, it only means your condition has been reached. After that, the system still needs to run several risk and market checks before actually sending your market order. Because of these checks, a triggered conditional order is not guaranteed to be filled. The following reasons are all based on the situation at the exact moment your order is triggered. Below are the most common reasons:

1. Price deviation protection

If, at the time of trigger, the last traded price is very far away from the stock’s average traded price for the day, the system may treat this as an

abnormal price. 

This can happen during:

•  Sudden sharp moves (flash crash / spike)
•  Very low liquidity
•  Possible error trades

To protect you from being filled at an extreme or unreasonable price, the system may block your market order and not send it to the market.

2. Incomplete market data

Market orders need reliable, real‑time data such as:

•  Last traded price
•  Best bid price
•  Best ask price

If any of these prices are missing or unavailable when your condition is triggered, it suggests the market data may be incomplete or abnormal.

In this case, to avoid executing your order with uncertain pricing, the system will reject the market order instead of sending it.

3. Not enough buying power

In a fast‑moving market, a market order can be filled at a price worse than the current last price (higher for buys, lower for sells).

To manage this risk, the system will:

•  Estimate a safe maximum cost for your market order
•  Check whether your available cash / buying power is enough

If your buying power is not sufficient to cover this estimated cost, the system will reject the market order to prevent overdrafts or excessive

leverage.