1. F & O Execution Range - All F&O contracts will have a live reference price and market orders will only get executed if there are orders within this range. Any order placed outside the execution range will be rejected by the exchange.
2. Circuit Limits - These limits are set on all F&O contracts and stocks to ensure no manipulation in prices. When the circuit limits are hit, it alerts NSE and NSE has to manually relax these limits. Unlike the execution range, the circuit limits are static unless the upper or the lower circuit limit is hit.