What is Order Book?

Indian market context (NSE)

Reference levels: Nifty 50 at 24,300, Reliance Industries at ₹1,300, Bank Nifty futures at 55,000 (lot size 30). Examples below show how Order Book shows up on Indian index, equity, and futures books — update to live quotes in your journal.

Nifty 50 perspective

Order Book on NSE cash and Nifty (24,300): co-movement with global futures (SGX/GIFT) affects open print — log pre-market cue in journal.

Bank Nifty futures perspective

Order Book visible in Bank Nifty depth at 55,000: banking basket drives ~40% of index move; watch HDFC/ICICI/Kotak contribution when interpreting order book.

How to validate

• Validate Order Book fills against broker contract notes monthly.
• Measure median slippage in points/₹ for Order Book on Bank Nifty vs mid-caps.
• Flag sessions with abnormal rejections or partial fills for separate review.
• Compare limit vs market tags only on symbols with similar liquidity.

How to track in TradeLyser

• Record order type, limit price, fill price, and latency on the trade.
• Tag “slippage > plan” when Order Book fills worse than expected.
• Monthly slippage report by symbol and order type in analytics.
• Reconcile with broker order log quarterly.

Best practices

• Choose Order Book before the move, not after FOMO entry.
• Default to limits on illiquid mid-caps; markets on urgent exits only.
• Log rejected orders — they reveal unrealistic limit discipline.
• Review slippage in R-multiples, not only rupees.

Common pitfalls

• Chasing with market orders after Order Book already moved.
• Using limits on fast Bank Nifty breaks without timeout rules.
• Not recording partial fills — skews performance stats.
• Assuming broker fills match intended Order Book every time.

How to use this in TradeLyser

Note top-of-book size vs your order size; tag imbalance if used as signal.