Kalshi ETH, SOL and XRP 15-Minute Markets Explained: Rules, Settlement, Fees and How They Differ From Bitcoin

Short answer: Kalshi's Ethereum, Solana and XRP 15-minute markets (series tickers KXETH15M, KXSOL15M and KXXRP15M) ask the same yes-or-no question as the Bitcoin one: will the coin's price at the end of this 15-minute window be at least what it was at the start? Each settles on a 60-second average of the matching CF Benchmarks Real Time Index, not on any single exchange's price. The rules are nearly identical to Bitcoin's. The differences that matter are the index each one uses, how many decimals the final value keeps, and how much less trading there is in each window.

DeskBot is independent software and is not affiliated with or endorsed by Kalshi or CF Benchmarks. This article explains how the contracts work. It is not a trading tip or a prediction of results. Trading involves risk and you can lose money.

If you have not read it yet, start with our Kalshi Bitcoin 15-minute market explainer. It covers the mechanics shared by all of these series in detail: ticker anatomy, why the 60-second average matters, the tick grid and settlement timing. This page covers what is different for ETH, SOL and XRP. Every contract detail below comes from Kalshi's public Trade API (/series/KXETH15M, /series/KXSOL15M, /series/KXXRP15M and their settled /markets) as it read on October 14, 2026. Kalshi can change contract terms, so check the live market before you trade.

What the three markets are

Each series lists one market per 15-minute window. The market titles read "ETH price up in next 15 mins?", "SOL price up in next 15 mins?" and "XRP price up in next 15 mins?". Kalshi files all three under the Crypto category with frequency fifteen_min, and they share the same contract terms document as the Bitcoin series.

The rule for one Ethereum window, as Kalshi publishes it (paraphrased): the market resolves Yes if the simple average of the sixty seconds of CF Benchmarks' ETHUSDRTI before 8:15 AM EDT is at least the simple average of the sixty seconds of ETHUSDRTI before 8:00 AM EDT. Otherwise it resolves No. The Solana and XRP rules are word-for-word the same, with SOLUSDRTI and XRPUSDRTI in place of the Ethereum index.

Each contract pays $1.00 if your side wins and nothing if it loses. The price you pay is your cost per contract.

How they settle

All three series use the same mechanism as Bitcoin:

• The index, not an exchange. Kalshi's rules text says that checking a source like Google or Coinbase may help guide a decision, but the settlement price comes from CF Benchmarks' Real Time Index for that coin.
• A 60-second average. In the last minute before expiration, 60 index prices are collected and averaged. Each second carries 1/60 of the final value, so a late spike in spot moves the result much less than it appears to.
• Ties go to Yes. The strike type is greater_or_equal.
• The target is the last window's final value. The "Target Price" (floor_strike) is the opening 60-second average, which is the previous window's final value. We checked the chain on all three. Ethereum's 7:45–8:00 AM window settled at $2,502.09, and the 8:00–8:15 window's target was $2,502.09. Solana went $107.0792 to $107.0792, and XRP went $1.3729 to $1.3729.

Settlement is quick. In the windows we checked, every ETH, SOL and XRP market posted its result about four seconds after the close. Each also lists an expected expiration five minutes after close and a latest expiration a week later, the outer limit if the index source is disrupted. All three carry can_close_early: true, so Kalshi can close a market before its scheduled time.

How they differ from Bitcoin 15-minute markets

The contract mechanics are the same. These are the differences we found in the API data.

1. A different index for each coin

Bitcoin settles on CF Benchmarks' BRTI. ETH, SOL and XRP each settle on their own index: ETHUSDRTI, SOLUSDRTI and XRPUSDRTI. If your model or bot watches an exchange feed, it is watching a proxy. The gap between that feed and the index can matter more on smaller coins.

2. Decimal places in the final value

This matters for code. If you store or compare targets as two-decimal numbers, you will be wrong on Solana and XRP. Rounding also sets how fine the price measurement is. One step of $0.0001 on XRP near $1.37 is about 0.007% of the price. One cent on Bitcoin near $83,000 is about 0.00001%. So an exact tie (which goes to Yes) is still uncommon on XRP, but far less negligible than on Bitcoin.

3. Much thinner trading

For the same window (8:00–8:15 AM EDT on October 14, 2026), the API reported these contract volumes:

That is one window, not an average, but the gap is large: roughly 20 to 55 times less volume than Bitcoin. Thinner markets usually mean wider spreads and less size at the best price. A larger order can fill across several price levels. Our guide to reading the Kalshi order book shows how to check depth before you send an order.

What is the same

All three series show the same tapered_deci_cent price grid as Bitcoin: 0.1¢ ticks from 0¢ to 10¢ and from 90¢ to $1.00, and 1¢ ticks in between. They also use the same fee type (quadratic) and fee multiplier (1), and the same $1.00 notional per contract.

Kalshi also lists 15-minute series for other coins, including Dogecoin, BNB, Cardano, HYPE, NEAR, Bitcoin Cash, TON and Zcash. Check each series' own rules before you assume they match.

Fees and breakeven by entry price

Because the API lists the same quadratic fee type and multiplier 1 for ETH, SOL and XRP as for Bitcoin, the fee math is the same. Under Kalshi's published fee schedule, the taker fee for an order that fills immediately is round up(0.07 × contracts × P × (1 − P)), where P is the price in dollars. Resting maker orders use 0.0175 in place of 0.07. Breakeven is (price + fee per contract) ÷ $1.00. Before rounding, taking liquidity:

The table leaves out two costs, and both are bigger on these thinner markets. The first is the spread, because you buy at the ask, not the midpoint. The second is the round-up on the fee, which hurts small orders most. A single contract at 50¢ has a raw fee of 1.75¢, which rounds up to 2¢. Near 90¢ and above, one loss can wipe out the gains from many wins. See the breakeven win rate guide and maker vs taker fees for more cases.

What to check before automating ETH, SOL or XRP

• Use the right index. Map each series to its own index (ETHUSDRTI, SOLUSDRTI, XRPUSDRTI). Never copy Bitcoin's settings to another coin wholesale.
• Keep the full precision. Store floor_strike at four decimals for Solana and XRP. Read it from the API every window instead of computing it yourself.
• Price the last minute against the running average, not live spot, exactly as with Bitcoin.
• Check depth and spread, not just the top price. Size orders for the book that is actually there. Thin windows are where fills slip.
• Measure each coin separately. A rule that is fine on Bitcoin can fall below breakeven on a faster-moving coin. Judge each market on a large sample against its own breakeven. Our results by market article shows why one blended number can hide a losing market.
• Handle early close and delayed settlement as normal cases, and wait for the result field before you book a win or loss.

For a full pre-flight list, see the Kalshi trading bot checklist.

Watch it on paper first

DeskBot for Kalshi runs on your own Mac or Windows PC and reads Kalshi's 15-minute crypto markets, not just Bitcoin. It connects to your own Kalshi account with your own API key, and you choose the settings and decide whether it trades. DeskBot for Kalshi is $19.99 a month. Paper results are not live results, and nothing guarantees profits, returns, win rates or income.

FAQ

What are KXETH15M, KXSOL15M and KXXRP15M?

They are Kalshi's series tickers for the Ethereum, Solana and XRP 15-minute "price up or down" markets. Each window has one market. It resolves Yes if the coin's closing 60-second index average is at least its opening 60-second average.

What price settles the Kalshi ETH, SOL and XRP 15-minute markets?

CF Benchmarks' Real Time Index for each coin: ETHUSDRTI, SOLUSDRTI and XRPUSDRTI. Kalshi averages 60 one-second readings from the final minute. ETH is rounded to 2 decimals; SOL and XRP are rounded to 4.

Are the rules different from the Bitcoin 15-minute market?

The mechanism is the same: a 60-second average, ties going to Yes, the target set by the previous window's final value, the same tick grid and the same fee type. The differences are the index, the decimal precision for SOL and XRP, and far lower volume per window.

What are the fees on these markets?

Kalshi's API lists the same quadratic fee type and multiplier as Bitcoin. Under Kalshi's published schedule, a taker pays about 0.07 × contracts × price × (1 − price), rounded up. At 50¢ that is 1.75¢ per contract, so breakeven is 51.75% before spread.

Can I practise on these markets without real money?

Yes. Kalshi runs a separate demo environment where you can practise without real money. Read paper vs live for why paper fills usually look better than live ones, especially on thin markets.

Risk: Trading on Kalshi involves risk, and you can lose money. There are no guaranteed results, and past or paper results do not predict future results. DeskBot is not affiliated with or endorsed by Kalshi or CF Benchmarks. Contract details were quoted from Kalshi's public API on October 14, 2026. Check the current contract terms before trading.