What Is a Depth Chart
If candlestick charts tell you "what happened in the past," then the depth chart tells you "how market forces are distributed right now."
A Depth Chart visually displays all unfilled buy and sell orders currently on the market. Through it, you can see at each price level how many people want to buy and how many want to sell.
This information is incredibly useful because it helps you:
- Assess the balance of buying vs. selling pressure
- Identify potential support and resistance levels
- Understand the price impact your large orders might cause
- Spot potential "whale" activity
Basic Components of the Depth Chart
The Order Book
Before diving into the depth chart, let's understand the order book. In the center of Binance's trading interface, you'll see two columns of numbers:
Left/Top (Green) = Buy Orders (Bids): Shows buy orders at different price levels. Bids closer to the current price are more likely to be filled.
Right/Bottom (Red) = Sell Orders (Asks): Shows sell orders at different price levels. Asks closer to the current price are more likely to be filled.
The gap between the best bid and best ask is called the "Spread." A smaller spread indicates better market liquidity.
What the Depth Chart Shows
The depth chart represents order book data as curves:
- Green area (left): Represents cumulative buy order volume. Moving from right to left, as prices decrease, cumulative buy volume increases.
- Red area (right): Represents cumulative sell order volume. Moving from left to right, as prices increase, cumulative sell volume increases.
- The meeting point in the middle: The current market price.
Steeper curves indicate denser orders in that price range. "Steps" or "cliffs" in the curve indicate large concentrated orders at a specific price.
How to View the Depth Chart on Binance
Mobile App
- Navigate to a trading pair page (e.g., BTC/USDT)
- Below the candlestick chart area, switch to the "Depth" view
- You can also directly view the order book's bid/ask list
Web Platform
- Go to the trading page
- Find the "Depth Chart" tab below the candlestick chart
- Click to switch to depth chart view
- Use the mouse scroll wheel to zoom in/out for different ranges
Order Book Precision Adjustment
At the top of the order book, you can adjust price precision (merge depth):
- 0.01: Shows orders at each 0.01 USDT increment
- 0.1: Merges orders within 0.1 USDT ranges
- 1: Merges orders within 1 USDT ranges
- 10/100: Larger merging ranges
Higher precision (smaller number) shows more detail. For short-term trading, use 0.01 or 0.1; for viewing broader support and resistance, use 1 or 10.
Using the Depth Chart to Assess Buy/Sell Pressure
Buyer Strength vs. Seller Strength
Compare the areas on both sides of the depth chart:
- Green area significantly larger than red: Buy pressure dominates -- market leans bullish
- Red area significantly larger than green: Sell pressure dominates -- market leans bearish
- Both sides roughly equal: Balanced -- direction unclear
But note that this is just a reference indicator, not a standalone trading signal. Because:
- Large orders can be withdrawn at any time
- Many whales don't place their orders on the visible order book
- Some large orders are placed intentionally to intimidate the other side
Identifying "Walls"
If the depth chart shows a large "step" (sudden increase in cumulative volume) at a certain price, this is typically called a "buy wall" or "sell wall."
Buy Wall: Massive buy orders stacked at a certain price.
- Possible meaning: Strong support at this price -- hard for price to break below
- Could be fake: Whales intentionally placing large buy orders to create an illusion of support
Sell Wall: Massive sell orders stacked at a certain price.
- Possible meaning: Strong resistance at this price -- hard for price to break above
- Could be fake: Whales intentionally placing large sell orders to suppress the price for cheaper buying
How to Tell If a Wall Is Real or Fake
- Observe duration: Genuine large orders tend to stay for longer periods. If a large order gets quickly cancelled, it's likely fake.
- Watch volume: If volume increases as price approaches the wall and the wall gets gradually "eaten," the market has enough force to break through.
- Multi-level confirmation: Multiple large orders forming a "staircase" defense at the same zone is more reliable than a single large order.
Practical Applications of Depth Chart Analysis
Application 1: Assessing Price Impact of Your Orders
If you want to market-buy a large amount (say 10 BTC), the depth chart tells you what price your order will "eat through."
How to check:
- Look at the sell (red) side
- Start from the mid-price and move right
- Add up sell order quantities until reaching your buy amount
- The price at that point is your approximate average execution price
If the depth is thin (curve is very gradual), your large buy will cause significant slippage. In that case, consider using limit orders or buying in batches.
Application 2: Finding Support and Resistance Levels
Areas of concentrated large orders on the depth chart often represent potential support or resistance.
Example:
- BTC current price: 65,000
- Large buy wall at 64,000
- Large sell wall at 67,000
- Then 64,000 may be short-term support and 67,000 short-term resistance
You can set your limit buy or sell orders near these levels.
Application 3: Gauging Short-Term Price Direction
When the depth chart is asymmetrical, it can serve as a reference for short-term direction:
Bullish signals:
- Dense buy orders near the best bid
- Sparse sell orders
- Large buy orders appearing and getting filled
Bearish signals:
- Dense sell orders near the best ask
- Sparse buy orders
- Large sell orders appearing and getting filled
Application 4: Choosing Better Limit Order Prices
Suppose you want to limit-buy BTC, and the depth chart shows:
- Many buy orders already queued at 64,500
- Relatively few buy orders at 64,200
You could place your order slightly above 64,500 (e.g., 64,510), so when the price drops to that zone, your order is ahead of those large buy orders and more likely to fill.
Important Caveats for Depth Chart Analysis
Caveat 1: The Depth Chart Changes in Real Time
Orders on the book can be added or cancelled at any moment. What you see is just a "snapshot" of the current moment, not a guarantee of the future.
Caveat 2: Iceberg Orders and Hidden Orders
Some whales use "iceberg orders," displaying only a small portion on the visible order book while keeping most hidden in the backend. So the visible depth may not represent the full picture.
Caveat 3: Don't Rely on the Depth Chart Alone
The depth chart is one auxiliary tool among many. It needs to be combined with candlestick charts, volume data, technical indicators, and other tools for comprehensive analysis. Making trading decisions based solely on the depth chart carries significant risk.
Caveat 4: Depth Varies by Trading Pair
Major trading pairs (BTC/USDT, ETH/USDT) typically have excellent depth with tight spreads and dense order books. Smaller tokens may have poor depth, sparse order books, and wide spreads. Pay extra attention to depth when trading small-cap tokens.
Advanced Order Book Observations
Beyond the visual depth chart, reading the raw order book numbers is also valuable:
Bid-Ask Spread
The gap between the best bid and best ask. For BTC/USDT, the spread is usually just 0.01-0.1 USDT (practically negligible), but for small tokens it can reach 0.5% or more.
Wider spreads mean higher trading costs, since market-buying and then immediately market-selling results in a loss equal to the spread.
Order Book Update Speed
Observe how frequently the order book updates. Faster updates indicate a more active market. If the order book barely moves for extended periods, the trading pair is very illiquid and not suitable for trading.
Large Order Monitoring
Watch for suddenly appearing large orders on the book -- this typically means significant capital is positioning at that price level. Use additional context to determine whether it's genuine support/resistance or a manipulative play.
Conclusion
The depth chart is a powerful market observation tool that gives you a real-time view of supply and demand. Once you learn to read depth charts, you'll feel more confident placing orders, choosing better prices, and assessing market direction.
Key takeaways:
- Green area vs. red area = buyer strength vs. seller strength
- Areas of concentrated large orders may be support or resistance
- The depth chart changes in real time -- don't over-rely on a single moment's data
- Combine with other analysis tools for best results
Practice regularly, and you'll develop an intuition for reading the order book in no time.