Order Flow & Book Reading

What Is the Order Book?

The order book is a real-time list of all pending buy and sell orders for an asset, organized by price level. It shows the supply and demand landscape at any given moment.

• Bid side: Buy orders waiting to be filled. Organized from highest bid (best price for sellers) downward.
• Ask side: Sell orders waiting to be filled. Organized from lowest ask (best price for buyers) upward.
• Spread: The gap between the best bid and best ask.
• Depth: The total volume of orders at each price level.

Market Microstructure

Market microstructure is the study of how orders interact, how prices form, and how the mechanics of trading affect outcomes. Key concepts:

• Price discovery: The process by which the market determines the "fair" price through the interaction of buy and sell orders.
• Liquidity: The ability to buy or sell without significantly moving the price. Deep order books = high liquidity.
• Market impact: The price change caused by executing a trade. Large orders have more impact.
• Information asymmetry: Some participants have better information than others. Their orders can signal future price direction.

Reading the Book: What to Look For

• Thick levels: Large orders stacked at a price level suggest strong interest. These can act as support/resistance.
• Thin levels: Sparse orders mean price can move quickly through that area.
• Imbalance: If the bid side is much thicker than the ask side, there's more buying interest. This doesn't guarantee price will rise (orders can be pulled), but it shows current intent.
• Spoofing: Large orders placed with the intent to cancel before execution. They create the illusion of demand/supply. This is illegal in regulated markets but still occurs.

Iceberg Orders

An iceberg order is a large order that's only partially visible in the order book. The exchange shows a small portion (the "tip") and automatically refills it as it gets filled.

• Purpose: To avoid revealing the full size of the order, which would signal intent to the market.
• Detection: If a price level keeps getting hit but the size keeps refilling, there may be an iceberg.
• Implication: Icebergs at a level suggest strong institutional interest that isn't visible in the book.

Tape Reading

The tape (or time and sales) is a record of every executed trade - price, size, and whether it was a buy or sell (taker side). Tape reading involves watching this flow in real time:

• Large prints: Big trades hitting the tape signal institutional activity.
• Aggressive buying: Trades executing at the ask price (buyers crossing the spread) indicate urgency.
• Aggressive selling: Trades executing at the bid price indicate selling urgency.
• Absorption: Large orders on one side being filled without price moving. Example: heavy selling at a level but price doesn't drop - someone is absorbing the selling pressure.

Delta and Cumulative Volume Delta

Delta (in order flow context, not options) is the difference between aggressive buying volume and aggressive selling volume:

• Positive delta: More aggressive buying than selling.
• Negative delta: More aggressive selling than buying.
• Cumulative Volume Delta (CVD): Running total of delta over time. A rising CVD suggests sustained buying pressure; falling CVD suggests sustained selling.

Limitations of Order Flow

• Speed: The book changes in milliseconds. By the time you react, the information may be stale.
• Spoofing and manipulation: Visible orders aren't commitments - they can be cancelled instantly.
• Fragmented markets: In crypto, liquidity is spread across many exchanges. The book on one exchange doesn't show the full picture.
• Skill ceiling: Tape reading is a skill that takes months or years to develop. It's not a shortcut.

Practice

Key Takeaways

Wat is orderflow?

Orderflow analyseert de werkelijke koop- en verkooporders die de markt bewegen. In plaats van alleen naar prijs te kijken, kijk je naar wie koopt, wie verkoopt en met welk volume.

Het orderboek

• Bids: Kooporders — de vraagzijde.
• Asks: Verkooporders — de aanbodzijde.
• De spread is het verschil tussen de beste bid en beste ask.
• Grote orders (“walls”) kunnen steun of weerstand creëren.

Belangrijkste punten