Trading pairs: base and quote, BTC/USDT, ETH/BTC and stablecoin pairs

Published 12 November 2026 · by Hunt4Coin

A trading pair is the price of one asset (the base) measured in another (the quote), so BTC/USDT tells you how many Tether dollars one Bitcoin costs and ETH/BTC tells you how many Bitcoin one Ether costs; every chart you read and every order you place is in a pair, and the quote currency decides what "up" and "down" actually mean.

Lesson 3 of the Hunt4Coin Trading Mastery Program · Module 1: Foundations · Previous: Lesson 2, timeframes and multi-timeframe reading · Next: Lesson 4, liquidity and spreads (coming soon).

In Lessons 1 and 2 we read Bitcoin's chart as if "the price of Bitcoin" were one number. It isn't. On an exchange you never trade "Bitcoin"; you trade Bitcoin against something. This lesson explains what that something is and why it changes what a chart tells you.

What it is

A pair is written BASE/QUOTE:

• The base is the asset you are buying or selling. In BTC/USDT it is Bitcoin.
• The quote is the asset you pay with and the unit the price is measured in. In BTC/USDT it is USDT (Tether, a stablecoin meant to stay at $1).
• The price answers one question: how many units of the quote buy one unit of the base? A BTC/USDT price of 74,015 means one Bitcoin costs 74,015 USDT.

When you buy BTC/USDT you spend USDT and receive BTC. When you sell it you give BTC and receive USDT. The same logic holds for every pair, which is why it helps to read a buy order as "buy the base, pay in the quote".

The three families of pairs you will meet most:

Stablecoin pairs are where most crypto volume trades, which is why Hunt4Coin's coin pages and charts show each coin against a dollar stablecoin (USDT, USDC or FDUSD, or USD on exchanges that list it).

How to spot it on a chart

Every chart has the pair in its title: "BTC/USDT · Binance · 1D". Three things to check before reading a single candle:

1. The quote. A chart of SOL/BTC moving up does not mean Solana's dollar price rose; it means Solana did better than Bitcoin. Both could be falling in dollars.
2. The exchange. BTC/USDT on two exchanges are two separate markets with their own order books, so candles differ slightly.
3. The decimals. Crypto-crypto prices are small numbers (ETH/BTC near 0.0278). A move from 0.03013 to 0.02778 looks tiny on paper but is a fall of about 7.8%. Always think in percent.

Worked example: one week, three pairs (Binance, 4–11 November 2026)

Here is what Binance's daily candles showed from the close of 4 November to the close of 11 November 2026, a week in which US inflation came in hotter than expected and spot Bitcoin ETFs saw outflows (see our 11 November and 12 November news). This describes past data only.

How to read it. In dollar terms, Ether fell about twice as far as Bitcoin. The ETH/BTC chart isolates the part of Ether's fall that was Ether's own: after removing Bitcoin's move, Ether still lost about 7.8% against it. The numbers are linked: 0.8481 (ETH's dollar change) ÷ 0.9194 (BTC's) ≈ 0.922, a fall of roughly 7.8%, which is what the ETH/BTC chart showed (small differences come from rounding and from each pair having its own order book).

What the ETH/BTC candles added. The ETH/USDT chart showed a steep fall all week. The ETH/BTC chart showed when Ether was weak relative to Bitcoin: the 8 November candle (the Sunday sell-off) fell from 0.02953 to 0.02842 (−3.8%), and the 10 November candle, the CPI day, reached a low of 0.02752 before closing at 0.02783. On 11 November, when Bitcoin rose 0.30% in dollars, ETH/BTC was nearly flat at 0.02778, so Ether did not out-perform on the bounce either.

Stablecoin pairs are not identical either. At about 05:00 UTC on 12 November, Binance's order books showed BTC/USDT at 73,660.47 bid / 73,660.48 ask, while BTC/USDC was 73,585.83 / 73,585.84, about $75 lower. The reason was the third pair: USDC/USDT traded at 1.00102, so one USDC cost slightly more than one USDT. 73,585.84 × 1.00102 ≈ 73,661, the BTC/USDT price. Same Bitcoin, two quote currencies a tenth of a percent apart.

How traders use pairs

• Dollar pairs for P&L and risk. Position size, stops and results are easiest to manage in a stablecoin pair because the unit is (about) one dollar.
• BTC pairs for relative strength. Many traders check ETH/BTC or SOL/BTC to see whether an altcoin is leading or lagging Bitcoin. A coin rising in dollars but falling against BTC is simply moving with the market, not leading it.
• Choosing the pair with the best book. The same coin can trade in several pairs; traders usually pick the one with the most volume and the tightest spread. In the 12 November snapshot, BTC/USDT's spread was one cent on $73,660 (about 0.00001%), while ETH/BTC's one-tick spread of 0.00001 on 0.0278 was about 0.036%, and SOL/BTC's about 0.018% against SOL/USDT's 0.012%. Lesson 4 covers liquidity and spreads in detail.

When it fails: common mistakes

• Reading a crypto-crypto chart as a dollar chart. "SOL/BTC is breaking out" can happen while SOL's dollar price falls.
• Forgetting the stablecoin is an asset too. Stablecoins usually trade within a fraction of a percent of $1, but not always exactly. Comparing BTC/USDT on one exchange with BTC/USDC on another mixes two effects.
• Comparing prices across exchanges or pairs and calling it an opportunity. Small gaps like the $75 above usually reflect the quote currency, fees or transfer costs, not free money.
• Measuring results in the wrong unit. A trade on ETH/BTC that gains 5% in BTC can still lose dollars if Bitcoin fell 10% meanwhile. Decide in advance which unit you keep score in.
• Trading a thin pair because the chart looks nice. Smaller pairs can have wide spreads and gaps that make stops fill far from their price.

Risk management: stops, size and invalidation by pair

• Size in the quote you can measure. Position = account × risk per trade ÷ stop distance (see the position sizing guide). On a crypto-crypto pair, convert the stop distance into dollars at today's price before sizing, because your account is probably counted in dollars.
• Put invalidation on the chart you trade. If the idea is "Ether is weak against Bitcoin", the stop belongs on the ETH/BTC chart; if the idea is "Ether's dollar price holds a level", it belongs on ETH/USDT. Mixing the two is a common way to get stopped out of the right idea.
• Two moves at once. A position in a BTC-quoted pair carries Bitcoin's own dollar risk on top of the pair's move. Halving size is a simple way to respect that until you are used to it.
• Mind the spread on entry and exit. On a pair with a 0.04% spread, a market order in and out costs about that much on top of fees (fees are Lesson 6).

Practice drill (free, about 20 minutes)

1. Open the Bitcoin and Ethereum pages on the free candle charts and select Binance, daily timeframe.
2. Write down the daily closes of 4 and 11 November 2026 for both and compute each percentage change. You should get about −8.1% and −15.2%.
3. Divide Ether's close by Bitcoin's close on each day to rebuild ETH/BTC by hand (2,424.61 ÷ 80,504.01 ≈ 0.0301). Compare with the table above.
4. Repeat for Solana: did it lose more or less than Bitcoin over the same week?
5. Open the crypto screener, sort by 7-day change and note which of the top coins did better than Bitcoin over the last 7 days. That list is a rough relative-strength scan.
6. In paper trading, plan (don't place) one trade in a stablecoin pair: entry, stop, the size that risks 1% of a $1,000 practice balance, and which unit you'll judge the result in.
7. Optional: set a price alert on a level from the daily chart, and run a quick backtest with fees on BTC to see how a pair's costs add up over many trades.

Lesson 3 summary

Every price is a pair: base measured in quote. Stablecoin pairs show a coin's price in (roughly) dollars; crypto-crypto pairs like ETH/BTC show strength against another coin; and even two dollar stablecoins can differ by a tenth of a percent. Check the quote and the exchange before reading a candle, put the stop on the chart of the idea you are trading, and keep score in one unit. Next, in Lesson 4, we look at liquidity and spreads: why the same coin is cheap to trade in one pair and expensive in another. Full course: Hunt4Coin Trading Mastery Program.

Education only, not financial advice. Trading crypto, stocks, metals, oil or forex is risky; never trade money you can't afford to lose.

Sources

• Hunt4Coin: Bitcoin live price and Binance BTC/USDT daily candles (4–11 Nov 2026)
• Hunt4Coin: Ethereum live price and Binance ETH/USDT daily candles (4–11 Nov 2026)
• Binance Spot API: market data endpoints (klines and book ticker, used for the ETH/BTC candles and the 12 Nov spread snapshot)