Bitcoin trades every hour of every day, in fractions, on venues that can close your position before your stop is reached. Those three facts change the mechanics more than the volatility does.
BTC/USD is Bitcoin priced in US dollars, trading 24/7 with no session close. Positions are fractional, so size is simply risk money divided by the distance to your stop - 0.0143 BTC is a normal answer. On leveraged venues, liquidation can close the trade before your stop is reached, which is the check that matters most.

One point = 1 of price. A standard lot is 1 coins, so pip value = pip size × contract size × lots. Figures assume a USD account; confirm the contract size with your broker.
A professional charting terminal with a coach built in - the Mirror Desk helps you document, forward-test and encode your own edge as an indicator, from your own trade log. It is a tool for your process, not a signal service and not a promise of results. It is a free preview of the real desk, and a free guest account is required to open it: put in your email, we send a login code, and you are on a live chart in under a minute. The preview runs real market data with one indicator at a time - nothing is saved and no broker is connected. A preview of the product, not advice.
Open BTCUSD on the live desk (H1) → See what the desk does →You never buy whole coins. Risk money divided by the stop distance gives the units, and the tool above does it from the live price. The crypto position size calculator adds the liquidation comparison for leveraged positions.
On a leveraged venue the exchange closes the position when maintenance margin runs out, regardless of your stop. At high leverage the liquidation price can sit closer than your stop, which makes the stop decorative. Check the two distances against each other before every leveraged trade - it is the single most useful habit in crypto.

Chart Bound replays real historical tape, free, so you can learn this instrument's rhythm before any money is on it.
Play free, no signup →There is no close to flatten into and no weekend gap: instead, the thin hours arrive while you are asleep. Decide in advance whether you hold overnight, because a position left open is exposed through every one of them. Our live price here comes from a candle fallback rather than a tick feed, so treat its timestamp with the same caution the page displays.
Divide the money you are willing to risk by the distance from entry to stop. The result is fractional - a position of 0.0143 BTC is normal.
The exchange closing a leveraged position when margin runs out. If the liquidation price is closer than your stop, the exchange decides the outcome first.
Yes, including weekends. There is no session close, so the thin hours happen overnight in your time zone rather than as a weekend gap.
Liquidity and rate expectations, flows into listed products, leverage unwinds that cascade into liquidations, and venue or regulatory news.
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Chart Bound replays real historical tape, free, so you can learn this instrument's rhythm before any money is on it.
Play free, no signup →