#volume

Which markets are under accumulation or distribution and where volume is surging, computed live from Yahoo Finance (no key, nothing stored). Price tells you what is happening; volume tells you whether to believe it. On-Balance Volume adds the day's volume when a market closes up and subtracts it when it closes down, so a rising OBV means buyers are in control (accumulation) and a falling OBV means sellers are (distribution) — and a divergence between OBV and price is an early warning of a turn. A volume surge — today's volume well above its recent average — flags conviction behind a move. For a cross-asset, cross-sector universe — equity indices and sectors, gold, oil, commodities, bonds and crypto — this computes each asset's OBV trend over the last month, its latest volume versus the 20-day average, and tags it accumulation, distribution or neutral. The screener endpoint returns the markets under accumulation and distribution and the ones with a volume surge. The asset endpoint returns one market's OBV/volume card. The universe endpoint lists what is covered. The cross-asset volume / OBV screener cut — distinct from the bring-your-own-candle volume-indicator API and the crypto volume-profile API; it adds the volume dimension the price-only screeners miss.

api.oanor.com/obv-api

Live volume-based technical indicators that traders run to confirm a move with the volume behind it, computed on demand from the OHLCV candles you pass in — no key, no cache, nothing stored. The mfi endpoint returns the Money Flow Index, a volume-weighted version of RSI that swings from 0 to 100, with an overbought reading above 80 and oversold below 20. The obv endpoint returns On-Balance Volume, the running total that adds a candle's volume on an up close and subtracts it on a down close, together with whether it is rising or falling — rising OBV confirms buying pressure. The cmf endpoint returns the Chaikin Money Flow, which sums money-flow volume over the lookback to show whether buyers or sellers are in control. These indicators all need the volume of each candle, which makes them a fundamentally different tool from price-only indicators like RSI, MACD, Stochastic and ADX: they answer whether volume is confirming the price move or diverging from it. Works for any market — forex, stocks, crypto or commodities — because you supply the candles with volume. Computed locally and deterministically, so it is instant and private. Ideal for trading bots, divergence screeners, breakout confirmation and trading dashboards. Candles are open:high:low:close:volume. Live, nothing stored. 3 compute endpoints. For price-only indicators use a technical-indicators, oscillators or trend-indicators API.

api.oanor.com/volumeindicators-api

Live rankings and comparison of crypto exchanges, served from the public CoinPaprika feed — no key, nothing cached. Rank every crypto exchange by adjusted 24h volume with its 7d/30d volume, number of markets and currencies and confidence score; pull one exchange's full profile (volumes, market count, website and social links, status); list an exchange's trading pairs with price and 24h volume; and search exchanges by name. A cross-exchange comparison layer, distinct from single-exchange ticker feeds and whole-market price feeds — it answers which venues are biggest and what they trade. Volumes in USD; adjusted = wash-trade-filtered.

api.oanor.com/cryptoexchanges-api

Live most-traded crypto pairs by 24-hour spot volume as an API, powered by Binance. It ranks the trading pairs by their 24-hour quote volume — where the real liquidity and activity is right now — with each pair's last price, daily change, 24-hour high and low, base and quote volume, and the number of trades. Rank by any quote currency (USDT, BTC, ETH, USDC), or look a single pair up for its full 24-hour stats. The spot-volume and market-activity leaderboard for trading, screening and dashboard apps. Live, no key, no cache. Distinct from price-change movers and from DEX-volume APIs — this is centralised-exchange spot trading volume.

api.oanor.com/cryptovolume-api

Live decentralised-exchange trading volume across the whole crypto ecosystem as an API, streamed from the DefiLlama DEX feed. For thousands of DEX protocols: the trading volume over the last 24 hours, 7 days and 30 days, the day/week/month change, the chains they run on, and each one's share of the total DEX market. Rank the busiest DEXes, drill into a single one, see how trading volume is split across chains, or read the market-wide total. Built for crypto, trading and dashboard apps. Live, no key. Distinct from TVL, fees, yield and stablecoin APIs — this is the on-chain trading-activity surface.

api.oanor.com/dexvolume-api

Aquarium maths as an API, computed locally and deterministically. The volume endpoint computes a tank's water volume — in US and UK gallons and litres — for a rectangular, cube, cylinder, hexagonal or bow-front tank from its dimensions (inches by default, or centimetres, millimetres and metres), and applies a fill factor (default 0.9) for substrate, decoration and freeboard to give a realistic net volume. The stocking endpoint gives a rough stocking load from the tank volume and the total length of fish using the classic inch-per-gallon guideline, reporting the maximum recommended inches and how heavily stocked the tank is. The waterchange endpoint computes the water-change volume for a percentage, with an optional dechlorinator dose. Everything is computed locally and deterministically, so it is instant and private. Stocking is a rough beginner guideline only — real stocking depends on the species, filtration and bioload. Ideal for aquarium and fishkeeping apps, pet-shop and hobbyist tools, and tank-setup planners. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is aquarium maths; for swimming-pool volume and chemical dosing use a pool API and for storage-tank gauging use a tank API.

api.oanor.com/aquarium-api

Tank volume and fill-level maths as an API, computed locally and deterministically. The volume endpoint gives the total capacity — in litres, US gallons and cubic metres — of a vertical cylinder, horizontal cylinder, rectangular tank, sphere or capsule, from its dimensions in metres, centimetres, millimetres, feet or inches. The fill endpoint computes the volume of liquid and the percent full at a given fill depth, using the exact geometry for each shape — including the circular-segment formula for a horizontal cylinder (where the level is famously non-linear) and the spherical-cap formula for a sphere. The level endpoint is the inverse "dipstick" calculation: it finds the depth that corresponds to a target volume or a target percentage, solving the segment geometry by bisection. Everything is computed locally and deterministically, so it is instant and private. Ideal for fuel, water, oil and chemical tank monitoring, agriculture and irrigation, process and industrial tooling, and tank-gauging and dipstick apps. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is tank-gauging geometry; for swimming-pool volume and chemical dosing use a pool API, and for plain unit conversion use a unit-conversion API.

api.oanor.com/tank-api

Calculate the geometry of common shapes. Get the area of 2D shapes (circle, square, rectangle, triangle — by base/height or three sides via Heron, trapezoid, parallelogram, rhombus, ellipse, regular polygon), the perimeter or circumference, and for 3D shapes the volume and surface area (sphere, cube, box, cylinder, cone, square pyramid). Pass a shape and its dimensions and get back the exact result plus the formula used. Pure local math — no key, no third-party service, instant and deterministic. Live. 6 endpoints. Built for CAD and engineering tools, education and e-learning, construction and material estimation, and any app that needs reliable shape math. Distinct from a generic expression evaluator or unit converter.

api.oanor.com/geometry-api