Definition
Order-to-Trade Ratio (OTR)
The order-to-trade ratio measures the number of orders (including modifications and cancellations) a participant submits relative to the number of actual trades executed, used to police excessive messaging.
Indian exchanges monitor the OTR closely because HFT and algo strategies can flood the system with orders that are quickly cancelled, straining infrastructure and potentially enabling manipulation. NSE and BSE levy graded penalties when a member's OTR in a segment crosses defined thresholds.
The OTR framework discourages quote stuffing and other abusive patterns while still allowing legitimate market making, which inherently posts and cancels many quotes. By charging for high message-to-trade activity, exchanges align incentives so that participants only generate the order traffic they genuinely need.
Related terms
- Algorithmic TradingAlgorithmic trading is the use of computer programs that follow pre-defined rules on price, timing, quantity and other variables to place and manage orders automatically, with little or no human intervention per order.
- High-Frequency Trading (HFT)High-frequency trading is a subset of algorithmic trading characterised by extremely high order submission rates, very short holding periods and reliance on ultra-low-latency infrastructure to capture tiny, fleeting price discrepancies.
- Market Making (Algorithmic)Algorithmic market making is the automated, continuous posting of buy and sell quotes for a security to provide liquidity, earning the bid-ask spread while managing inventory and adverse-selection risk.
- SEBI Algo ApprovalSEBI algo approval refers to the regulatory framework under which algorithmic trading strategies must be vetted and authorised by the exchange before deployment, with unique identification and audit trails.
Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.