{
  "license": "CC-BY-4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "ChainChoice (https://chainchoice.io)",
  "url": "https://chainchoice.io/data/methodology/2026.10.5.json",
  "version": "2026.10.5",
  "status": "archived",
  "publishedAt": "2026-10-10",
  "title": "A product its own terms limit to named countries is offered only there",
  "supersededBy": "2026.10.6",
  "previous": "2026.10.4",
  "changelog": {
    "url": "https://chainchoice.io/methodology/changelog#v-2026.10.5",
    "entry": {
      "version": "2026.10.5",
      "publishedAt": "2026-10-10",
      "title": "A product its own terms limit to named countries is offered only there",
      "summary": "A row can now carry the only countries its own terms serve (servedCountries), and the country test reads that list before any region: CoinDCX is offered to readers in India only, Upbit in South Korea, Mercado Bitcoin in Brazil, Luno in its five countries, Bitvavo in its 24 SEPA countries and Gemini in the United States and Singapore. Bybit, Kraken, OKX and Bitso now exclude the countries their quoted restricted lists name.",
      "rationale": "A region tag cannot say \"India only\", so these rows were offered across their whole region: a reader in Pakistan saw CoinDCX, a reader in the United Kingdom saw Bitvavo. And four exchanges quoted restricted-country lists that never reached the country test, so a reader in Singapore, Hong Kong or mainland China was offered Bybit, which excludes all three, and a reader in India was offered OKX, which names India among its Restricted Locations.",
      "affectedCategories": [
        "exchange"
      ],
      "changes": [
        {
          "type": "added",
          "description": "servedCountries: the ISO codes of the only countries a row serves by its own terms. The country test decides on it before reading any region tag, and the \"Serves <region>\" filter treats a country outside it as excluded. Every code must be named in the row's quoted availability evidence (tests/availability-matches-own-terms)."
        },
        {
          "type": "fixed",
          "description": "Bybit excludes the United States, mainland China, Hong Kong, Singapore and Canada (its Service Restricted Countries list); Kraken Japan and Singapore (its prohibited-regions list and its Singapore statement); OKX adds India and Malaysia to Canada, Hong Kong and Japan (its Restricted Locations); Bitso adds Venezuela (its Schedule A)."
        },
        {
          "type": "changed",
          "description": "CoinDCX, Upbit, Mercado Bitcoin, Luno, Bitvavo and Gemini list the only countries they serve. CoinDCX's and Luno's partial restriction lists of 2026-09-30 are replaced: they left CoinDCX offered in Malaysia, Pakistan, Taiwan and China, and Luno in India and across Africa."
        },
        {
          "type": "changed",
          "description": "Published (no-country) orders do not move: the published run states no country. Country results change: in India the exchange shortlist falls from 10 eligible rows to 6 and its runner-up changes from OKX to Bitstamp, the #1 unchanged; country pages list 20 fewer rows (24,377 to 24,357)."
        }
      ],
      "approvedBy": "mathias-siemonsmeier"
    }
  },
  "rules": {
    "source": {
      "src": "git:6cdbe7168afbcb72a4ae0fccbf5d2d1a46553c6c",
      "at": "2026-10-10T15:58:12+08:00",
      "note": "The category specs as committed at the last commit before the next version was recorded."
    },
    "introduced": {
      "commit": "7bc2db2b2a2f1322ae76e6f74834bfd841c0d17a",
      "at": "2026-10-10T15:34:59+08:00"
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    "specCommitsAfterIntroduction": 0,
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        "sha256": "2d08625c03372a57924a4188221c9cee49f087e391258f774b6b8bdd9c262b6a",
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        "specVersion": "2026.08",
        "sha256": "a75909802498788cf0df714c8faaea1af2f29a1f3442f46c829617026dd84ddb",
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      "tokenised_commodities": {
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        "sha256": "f776a1a62adf5fb7a2e53691dc35843ccbf508a91f39a2ca92e04c5a5c643adc",
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      "tokenised_funds": {
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        "sha256": "ce70bd7ada66a305bd3909b6de8f082490c81c348b55a3b3c9d9f8729f5281e3",
        "url": "https://chainchoice.io/data/methodology/category/tokenised_tbills.ce70bd7ada66a305.json"
      },
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        "specVersion": "2026.08",
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        "url": "https://chainchoice.io/data/methodology/category/trading_bots.796dc798321fd46c.json"
      },
      "trading_tools": {
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        "url": "https://chainchoice.io/data/methodology/category/trading_tools.90723c470dd26c29.json"
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      "transaction_simulation": {
        "specVersion": "2026.08",
        "sha256": "0c64054486715df93806e8101be41d4cfa4397631671d8140036ec2875407466",
        "url": "https://chainchoice.io/data/methodology/category/transaction_simulation.0c64054486715df9.json"
      },
      "travel_rule_compliance": {
        "specVersion": "2026.08",
        "sha256": "d7847a6c8b3fb39947868fd2c31978af216898427127a7e07ae3d9091d9d6ebb",
        "url": "https://chainchoice.io/data/methodology/category/travel_rule_compliance.d7847a6c8b3fb399.json"
      },
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        "specVersion": "2026.08",
        "sha256": "fa438b6cf489aba45dfb6287475a22bd94d1276e7d65e22dd4ec1fb6fb916802",
        "url": "https://chainchoice.io/data/methodology/category/wallet.fa438b6cf489aba4.json"
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      "wallet_screening": {
        "specVersion": "2026.08",
        "sha256": "5127ae5ba6779ffbf9e6cf9bcd5d85e0ecdb50210a415c161113597224554c01",
        "url": "https://chainchoice.io/data/methodology/category/wallet_screening.5127ae5ba6779ffb.json"
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        "sha256": "17c4b2ec1128628d7ac853b31206630e1e9e71d928342811fbc53e09418c53c7",
        "url": "https://chainchoice.io/data/methodology/category/web3_apps.17c4b2ec1128628d.json"
      },
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        "specVersion": "2026.08",
        "sha256": "f3fad21723fd154b6c6762aa003c0e52809c8a3aa8c0678207ac33cd82549dd8",
        "url": "https://chainchoice.io/data/methodology/category/wrapped_assets.f3fad21723fd154b.json"
      },
      "yield_aggregators": {
        "specVersion": "2026.08",
        "sha256": "5f929dd0ebc40f84d17b6731550efcc10dbdae7cafd71ce0e8cd1abaea61d302",
        "url": "https://chainchoice.io/data/methodology/category/yield_aggregators.5f929dd0ebc40f84.json"
      },
      "yield_vaults": {
        "specVersion": "2026.08",
        "sha256": "14dc93f329c5af144155592d8ce86000140c5d7fea736e46b2345bae250a283a",
        "url": "https://chainchoice.io/data/methodology/category/yield_vaults.14dc93f329c5af14.json"
      }
    },
    "formula": {
      "step1_weightedTotal": "weightedTotal = round((SUM over dimensions of (breakdown[d] / baseWeight[d]) * weight[d]) / (SUM of weight[d]) * 86, 6 decimal places), where every breakdown[d] is a multiple of 0.1",
      "step2_absoluteScore": "absolute = min(99, max(40, round(weightedTotal <= 20 ? 40 + weightedTotal * ((60 + (20 / 86) * 38 - 40) / 20) : 60 + (weightedTotal / 86) * 38)))",
      "step3_poolRelative": "score = round(min(min(99, max(41, leaderScore - (leaderWeighted - weightedTotal) * 2.6)), scoreOfRowAbove))",
      "tieBreakChain": [
        "availabilitySource, for a reader who states a country only: in perp_dex, perp_house_vaults, options_vaults, prediction_markets, a row whose availability in that country rests on a region tag its record gives no source for (no availability note quoting the provider's terms, and no dated country entry) sorts below every row whose availability is sourced. No row carries it in the orders published in this file, which state no country.",
        "weightedTotal as step 1 states it, higher first. Only rows whose weighted totals are exactly equal reach the keys below.",
        "unroundedWeightedTotal, higher first: step 1 over the dimension points before they are kept to a tenth of a point, published per product. Since methodology v2 a shared weighted total from different unrounded points is ordered by those points, so only rows equal on both reach the keys below.",
        "criteriaAverage, higher first: the row's unrounded weighted average of its published criterion scores (0 to 10) under the weights in use. Applied only when both rows are scored on their category's criteria and the averages differ; otherwise the keys below decide. Since methodology 2026.09.12.",
        "tiebreakDelta, higher first: the sum of three factors. (1) Price: when the category has one comparable pricing basis that may decide rank (priced for at least two of its catalog rows, not an entry-plan figure derived from a price ladder, and quoted in a single currency), a priced row earns 0 to 2 points in proportion to where its price sits between the highest and the lowest in the pool, or 1 point when every published price on that basis is equal; a row with no price on that basis, and every row of a category without such a basis, earns 0. (2) Strength: 1 point when at least three of the row's catalog fitStrength values are 9 or above; those values are its published criterion scores, plus further strength keys on some rows. (3) Dimension: 1 point when the row scores at least 85% of the maximum on the highest-weighted dimension of the weights in use (the first in weights order when two are equal). A row outside the alternate product catalog (every payment_gateway row) carries 0. It orders rows and is never added to a score.",
        "objectiveFit points, higher first.",
        "product name, alphabetical."
      ],
      "tieBreakNote": "The published per-category tieBreakRules are not yet applied by the engine; where two rows share a weighted total and an unrounded weighted total, the chain above decides. Since methodology 2026.09.12 the first key after the totals is the two rows' unrounded weighted criterion averages, so a tie between rows scored on the published criteria is ordered by those criteria; the generic factors decide only where the averages are equal or a row has no criterion scores. tieBreakDecisions counts only pairs equal on both totals, and againstCriteria lists any of them still ordered against the criteria.",
      "note": "boundBy names which limit decided the number when one did: floor, ceiling, row-above, or none. Rows marked floor sit at 41 and the multiplication alone gives a lower figure.",
      "baseWeights": {
        "availability": 20,
        "objectiveFit": 30,
        "frictionFit": 10,
        "trustBonus": 8,
        "quantitative": 18
      },
      "unweightedDimensions": [
        "profileFit"
      ],
      "unweightedNote": "These dimensions are computed and published in every breakdown but carry no weight in the total. profileFit left the composite in methodology 2026.09.2: it was constant inside all 114 categories, so its 20 points moved every product in a pool identically and ordered nothing. Sum the breakdown against baseWeights and the unweighted terms are simply absent from the arithmetic — that is the intended reading, not an omission.",
      "weightVersusInfluence": "A base weight is how much a dimension COULD move a score, not how much it did. Each category publishes dimensionSpread: the range that dimension actually covered across its pool. A spread of 0 means the dimension was constant there and decided nothing, however large its weight.",
      "objectiveBasis": "Each product names where its objectiveFit points came from. \"criteria\": the block is the weighted sum of the published criterion cells, min(30, 0.75 × Σ weight × cell/10 × 32) kept to a tenth of a point, and a pairwise ledger can itemise it per criterion. \"whole\": the category scores the block from structural facts or capability flags rather than per-criterion cells, so it enters a ledger as one term. \"sunset\": the product no longer operates (sunsetAt gives the date) and the block is zeroed regardless of its cells.",
      "totalBaseWeight": 86,
      "dimensionResolution": 0.1,
      "weightedTotalDecimals": 6,
      "resolutionNote": "Since methodology v2 every breakdown value is kept to dimensionResolution (a tenth of a point) before it is weighted, and each product also publishes unroundedWeightedTotal: step 1 over its points before that rounding. Two products that share a weightedTotal are ordered by unroundedWeightedTotal before any key of tieBreakChain after it.",
      "spreadPerWeightedPoint": 2.6,
      "scoreFloor": 41,
      "scoreCeiling": 99,
      "leaderRobustnessNote": "leaderSurvivesOnePointChange: whether this category keeps its #1 when any single criterion score moves by one point on the 0-10 scale — the smallest difference two competent raters can hold. False in 34 of 118 categories. A false does not mean the ranking is wrong; it means the evidence separates the top two by less than the width of a judgement call, and the file says so rather than letting the displayed gap imply otherwise. null means the sweep could not run — too few criteria or too small a pool — and is deliberately not reported as robust."
    },
    "recipe": "sha256 is the SHA-256 of the category spec (the file's \"spec\" field) written as compact JSON: every object's keys sorted, no spaces or line breaks, non-ASCII characters as UTF-8 (not escaped), no trailing newline. That is the serialisation of the rankings digest."
  },
  "rankings": {
    "ledger": "https://chainchoice.io/data/rankings-ledger.jsonl",
    "produced": [
      {
        "seq": 4141,
        "rankingsDigest": "876b2f0336adf5cb0fdcdcb4a6d741e9baaf944bacd8c6953a7e6fa9b46dd333",
        "ob": "2026-10-10",
        "src": "git:03832af9cfd9acbc62fed29ac9daaf1032e69984",
        "engine": "2026.10.5"
      },
      {
        "seq": 4143,
        "rankingsDigest": "876b2f0336adf5cb0fdcdcb4a6d741e9baaf944bacd8c6953a7e6fa9b46dd333",
        "ob": "2026-10-10",
        "src": "git:80a450b50490a0bda741fd475faea66b88379bd4",
        "engine": "2026.10.5"
      }
    ],
    "whenIntroduced": "f1411d337d4b6f935c12d527d4fa7bf0a1e1687760875c2971ae9fb4fe0e82db",
    "whenSuperseded": "876b2f0336adf5cb0fdcdcb4a6d741e9baaf944bacd8c6953a7e6fa9b46dd333",
    "newest": null,
    "note": "produced lists the ledger's digest entries whose rankings.json was generated while this version was the newest changelog entry (seq is the entry's place in the ledger). whenIntroduced and whenSuperseded are the digests of the rankings.json committed with the first and the last commit of this version."
  },
  "gaps": [],
  "notes": []
}