What is Limit Price Protection? How does it work?

Limit Price Protection (LPP) – How Navia Keeps Your Trades Safe

Have you ever mistyped an order — say you meant to buy a option contract at ₹40, but accidentally typed ₹400? Or maybe someone tries to place an order way outside the market range to manipulate prices.

Without safeguards, such trades could cause huge losses and distort market fairness.

That’s where Navia’s Limit Price Protection (LPP) steps in — protecting your trades, your money, and market integrity.

What is LPP?

LPP is a pre-trade safety filter that ensures all limit orders in Futures & Options (F&O) stay within a safe, exchange-defined range.

It automatically blocks:

  • Buy orders placed far above or below fair value.
  • Sell orders placed way off from market prices.

This means you cannot:

  • Overpay by buying too high.
  • Exploit or mistakenly bid too low.
  • Manipulate the market by selling too high.
  • Undercut the market unrealistically by selling too low.

How LPP Works

1. Reference Price is Set

  • At market open → based on underlying price, interest rates & option pricing models.
  • During the day → based on the average traded price of the last 30 seconds.

2. Safe Range Applied (Exchange Rules)

Instrument

Reference Price

LPP Range

Index Futures (FUTIDX)

≤ ₹10,000

± ₹200


> ₹10,000

± 2%

Stock Futures (FUTSTK)

≤ ₹50

± ₹1.5


> ₹50

± 3%

Index & Stock Options (OPTIDX / OPTSTK)

≤ ₹50

± ₹20


> ₹50

± 40%

 

3. Order Validation in Action

  • If your order price is within the LPP range →  Accepted.
  • If it’s outside the LPP range →  Rejected instantly.

 

Example 1: Stock Futures Contract at ₹100

  • Reference Price: ₹100
  • LPP Band (±3%): ₹97 – ₹103

Scenario

Order Price

Outcome

Buy Too High

₹110

Rejected

Buy Too Low

₹90

Rejected

Sell Too Low

₹95

Rejected

Sell Too High

₹105

Rejected

Valid Buy

₹102

Accepted

Valid Sell

₹98

Accepted

 

Example 2: Option Contract at ₹40

  • Reference Price: ₹40 (≤ ₹50 → ±₹20 rule)
  • LPP Band: ₹20 – ₹60

Scenario

Order Price

Outcome

Buy Too High

₹70

Rejected

Buy Too Low

₹10

Rejected

Valid Buy

₹45

Accepted

Valid Sell

₹55

Accepted

 

Example 3: NIFTY Index Futures at ₹25,000

  • Reference Price: ₹25,000 (> ₹10,000 → ±2%)
  • LPP Band: ₹24,500 – ₹25,500

Scenario

Order Price

Outcome

Buy Too High

₹26,000

Rejected

Buy Too Low

₹24,000

Rejected

Sell Too Low

₹24,400

Rejected

Sell Too High

₹25,700

Rejected

Valid Buy

₹25,200

Accepted

Valid Sell

₹24,900

Accepted

 

Navia Advantage
 While LPP is mandatory on NSE & BSE equity derivatives, Navia also applies it on MCX — keeping your trades safe across all segments.

Rule of Thumb: 
Think of LPP as a safety guardrail — your order must stay within a % band or value band (set by the exchange) around the reference price. If it’s outside, the system Rejects it before it can cause losses or disrupt the market.

 

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