Trigger Price
In the context of Indian equity markets, the trigger price is the price level at which a stop-loss order becomes active and enters the exchange order book, as opposed to the limit price at which the order ultimately seeks to execute.
The trigger price is a concept unique to conditional orders and is central to how stop-loss orders function on NSE and BSE. When an investor creates a Stop-Loss Limit (SL) order, they specify two values: the trigger price and the limit price. The trigger price must be set at or above the limit price for a sell stop-loss (and at or below the limit price for a buy stop-loss). The order remains dormant in a pending state until the market price touches the trigger level, at which point it activates and enters the live order book as a limit order at the specified limit price.
For a Stop-Loss Market (SL-M) order, only the trigger price is specified. Once the trigger is hit, the order converts to a market order and executes at the prevailing best price.
A common practical error is confusing the trigger price with the execution price. Setting both the trigger price and the limit price at the same value in an SL order leaves no room for execution if the price is moving rapidly. For example, if an investor sets both trigger and limit at ₹195 and the stock falls rapidly from ₹200 to ₹193 without trading at ₹195 (a gap or fast market), neither leg activates and executes correctly. The industry convention is to set the trigger price slightly above the limit price for sell stop-losses to create an execution window.
Trigger prices also appear outside the stop-loss context. In the equity cash segment, brokers' risk management systems (Risk Management System or RMS) automatically square off positions when margin utilisation crosses certain thresholds, which are functionally similar to trigger-based actions. Additionally, in the derivatives segment, margin call triggers operate on the same principle—if the margin available falls below the required margin, the system triggers squaring-off of positions.
SEBI's 2020 peak margin framework changed the landscape by requiring upfront margins even for intraday trades, reducing the leverage available to retail traders and making the precise calibration of trigger prices more consequential for capital efficiency.