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COIN B&A: bids and asks in the order book by depth

6 min · DYOR Education
FreeCOIN · Order book
Goal

Learn COIN B&A: how much money sits in bids and asks at each depth and how to turn on the other depths.

COIN B&A on BTC/USDT, 15m. Green line is bids, red is asks at 3% depth
COIN B&A on BTC/USDT, 15m. Green line is bids, red is asks at 3% depth
What it shows

How much money sits in the order book to buy and how much to sell.

What it's based on: every minute the platform reads the exchange order book and sums orders per side within each depth.

  • Two lines per depth: bid (buy) and ask (sell).
  • Seven depths: 1.5 · 3 · 5 · 8 · 15 · 30 · 60%.
  • Units: millions of dollars or coins.

How to read it: D3 bid = 90 — buy orders from the price down to −3% hold $90M.

What it's for

See the demand wall and the supply wall in dollars. Which side of the price holds more money, and by how much.

For example.

  • D3 bid = 90, D3 ask = 40.
  • Below the price, within 3%, $90M of orders are waiting. Above the price, $40M.
  • To push the price down 3%, sellers have to “eat” $90M. To push it up 3%, buyers need $40M, half as much.
  • You see all of this at a glance from two lines, without scrolling the order book.
  • A sharp drop in the green line means the wall under the price was pulled. You see it on the same bar.
Where to find it
Indicators›COIN›Order book›COIN B&A
Settings
FieldOptionsDefaultWhat it changes
MarketSPOT
Futures
SPOTWhose order book to count: the spot or the futures market.
SPOT or FUTURES in the pane legend.
- Want orders from people buying the coin itself — SPOT.
- Want orders from people trading with leverage — FUTURES.
On Coinbase, Hyperliquid and Deribit the switch does nothing: Coinbase is spot only, Hyperliquid and Deribit are futures only, the value is set by the exchange itself.
CurrencyMILLIONS
COINS
MILLIONSUnits: millions of dollars or number of coins.
MILLIONS or COINS in the legend.
- Want to compare coins with each other — MILLIONS.
- Want to see volume in the coin itself, regardless of its price — COINS.
BTC pairsALL
USDT only
ALLWorks only on Binance and only for BTC.
ALL or USDT ONLY in the legend.
ALL — the sum of three pairs: BTCUSDT + BTCUSDC + BTCFDUSD.
USDT only — only the BTCUSDT pair.
For other Binance coins, data is always for the USDT pair; the input changes nothing.
Does nothing on Coinbase and Hyperliquid: Bitcoin has one pair there.
On Deribit too: the two BTC contracts are not added together.
- Want all of Binance's Bitcoin — ALL.
- Want to compare with a source that counts only BTCUSDT — USDT ONLY.
ExchangeChart
Binance
Coinbase
Hyperliquid
Deribit
ChartWhich exchange to take data from: Chart — the same one as the chart.
Binance — spot and futures, USDT pairs.
Coinbase — spot only, USD pairs.

Hyperliquid and Deribit — perpetual futures only, USDC pairs.
The list holds only exchanges where the coin trades.
Without a subscription there is no field.
- Want to compare one coin across exchanges — add the indicator several times and pick a different exchange in each.

By default one depth is visible — 3%. Turn on the other depths in the Styletab: tick the line you need.

In alerts

Metric COIN B&A. Condition fields:

ExchangeMarket TypeCoinBTC pairsTimeframeDelta PercentageAsk/Bid TypeValue Output Type

“Value Output Type” — Millions, Coins or Raw $ (dollars not divided by a million). “BTC pairs” appears only when the coin is BTC.

TOTAL

TOTAL B&A — the same summed over the whole market. The “Total Type” field is added.

Try it yourself
  1. Turn on COIN B&A on BTC/USDT 1h, in the “Style” tab leave only the 3% depth.
  2. Write down two numbers from the legend: bids and asks.
What you should get. You know how many dollars are waiting within 3% below and above the price, and which side is heavier.
Takeaway

COIN B&A is the money in the order book by side. Each of the seven depths has two lines, bid and ask, in millions of dollars or in coins. The 3% depth is visible by default. Turn on the others with checkboxes in the “Style” tab.

Quick check

The “D3 bid” line shows…

Show answer

Correct answer: The sum of buy orders within 3% below the price

Quick check

D3 bid = 90, D3 ask = 40. To push the price down 3%, sellers have to “eat”…

Show answer

Correct answer: $90M — all bids within 3%

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