Free Trading Course
Advanced Option Lessons

A hands-on options curriculum covering real trading concepts. Read the lessons, work through examples, and test your knowledge.

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Module 12: Order FlowAdvanced 15 Min

Lesson 4: 12.4: Limit Orders

Understand the passive side of order flow: resting orders that act as support, resistance, and liquidity barriers.

1. Passive Liquidity and Price Control

Limit orders are instructions to buy or sell at a specific price or better. They prioritize price control over execution certainty, resting in the book until hit.

These resting orders form the passive 'liquidity' of the market. They act as protective buffers or roadblocks. A thick block of resting buy limit orders will absorb selling pressure, preventing price from falling easily.

★ Iceberg Orders: Large institutional limit orders are often broken into tiny visible chunks (icebergs) to hide their true size from other participants.

2. Order Book Spoofing

Because limit orders can be cancelled at any time before execution, market participants often submit large limit orders far from the current price to create the illusion of support or resistance, only to cancel them as price approaches. This manipulative practice is known as spoofing.

A flow diagram with the boxes Parent quantity, Visible slice, Slice executed, Reserve remains and Display refresh
Follow the arrows: Parent quantity → Visible slice → Slice executed → Reserve remains → Display refresh. The idea of an iceberg order in outline. Limit orders can be marketable, and refills and queue priority depend on the venue. A cancellation alone does not prove spoofing.
Interactive Option Simulation Lab

Options Structure Exploration

LAB SIMULATOR ACTIVE

Options are contracts cleared in the bid-ask auction market. Interact with the Order Book below to understand how buy offers (bids) and sell offers (asks) intersect, and inspect the structural breakdown between Call and Put contracts.

Limit Order Book & Spread Interface
SELLERS (ASK)$2.1523 Contracts
$2.12 | 15 Contracts
BID-ASK SPREAD: $0.10
Mid-Price: $2.10
$2.08 | 41 Contracts
BUYERS (BID)$2.0554 Contracts

Hover over ASK or BID to dissect the auction market dynamics.

CALL OPTION
Right to Buy
  • Outlook: Bullish (Goes up)
  • Risk: Capped to premium paid
  • Profit: Scales as stock surges
Delta: Positive (0.00 to +1.00)
PUT OPTION
Right to Sell
  • Outlook: Bearish (Goes down)
  • Risk: Capped to premium paid
  • Profit: Scales as stock falls
Delta: Negative (0.00 to -1.00)

KNOWLEDGE RECONNAISSANCE

Q01.

What is an 'Iceberg' order in institutional order flow trading?

Signal Desk is where you practice this on real stocks: real option chains (about 15 minutes delayed), the Trade Check and a paper-trading account that risks no real money. Join to add it, your progress tracking and PDF downloads.

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