Chapter 8: Order Book Guide
The order book shows real-time supply and demand for a security.
Understanding it is essential, especially in smaller markets like Malta where liquidity can be limited.
This guide builds on the Company Pages Guide and explains how to interpret trading activity.
Progress: Chapter 8 of 16
📌 What You Will Learn
- What an order book is
- How to read bids and asks
- What spread and liquidity mean
- How to interpret market pressure
📊 What is an Order Book?
An order book is a list of all buy and sell orders for a security.
It shows:
- Buyers (bids)
- Sellers (asks)
- Prices and volumes
💡 The order book reflects real-time market sentiment.
📈 Bid vs Ask
🟢 Bid (Buy Orders)
The highest price someone is willing to pay.
🔴 Ask (Sell Orders)
The lowest price someone is willing to sell for.
Example:
- Best Bid: €0.480
- Best Ask: €0.500
This means:
- Buyers want to pay €0.480
- Sellers want €0.500
📉 Spread
The spread is the difference between the best bid and best ask.
Spread = Ask − Bid
Example:
- Ask: €0.500
- Bid: €0.480
- Spread: €0.020
A smaller spread means:
- Higher liquidity
- More active trading
A larger spread means:
- Lower liquidity
- Harder to trade efficiently
📦 Market Depth
Market depth shows the total volume of buy and sell orders.
Example:
- Buy Volume: 29,611
- Sell Volume: 291,949
This indicates:
- More sellers than buyers
- Potential downward pressure
⚖️ Buy/Sell Ratio
This compares buying pressure to selling pressure.
Example:
- 9.2% sell pressure
Interpretation:
- High sell pressure → more sellers
- High buy pressure → more buyers
📊 Additional Metrics Explained
💰 Best Bid / Best Ask
The top prices currently available in the market.
📉 Spread vs Close
Shows how current prices compare to the previous closing price.
📊 Average Level Volume
Average size of orders at different price levels.
📍 Range Position
Indicates where the current price sits within a recent range.
💧 Why Liquidity Matters
Liquidity refers to how easily you can buy or sell a security.
In smaller markets:
- Liquidity can be limited
- Prices may move sharply with small trades
This makes the order book especially important.
🧠 How to Use the Order Book
A simple approach:
- Check the spread
- Look at buy vs sell volume
- Identify market pressure
- Assess liquidity before trading
Then combine with:
⚠️ Common Mistakes
- Ignoring the spread
- Trading illiquid stocks blindly
- Misinterpreting temporary order imbalances
- Assuming large orders always reflect real demand
💡 Order books can change quickly — always use them together with broader analysis.
🔗 Related Guides
⬅️ Previous:
7. Company Pages
➡️ Next:
9. Profit & Loss