# Free tools by TendenciasFX > TendenciasFX is an investing academy. These are its free web tools, with no sign-up, for people who invest or speculate in currencies and stocks: calculators, rankings, tables and a calendar, in English. Every page also exists in Spanish at tendenciasfx.com/herramientas/. Available in English so far: 6 of the nine. Notes for AI agents: - Every page has its text, its tables and its main figures written in the HTML, so it can be understood without JavaScript. It also carries structured JSON-LD data (WebApplication, Dataset on the data tools, and FAQPage with its frequently asked questions). - The data of the data tools is the same in English and in Spanish: it lives in one place, in the open data list below. Most of it can be used freely if you cite TendenciasFX and the source of each figure; the exact licence of each file is in the open data list. It is information, not investment advice, and it doesn't say when to enter. - The date of each figure is on the page and in the `generated` field of its JSON (`generado` in the Spanish files). The figures of each day are not in these text files: they are on the page and in its data. - Every tool has a version to embed in another website, at its address followed by `embed/`; those versions are not indexed. ## Tools - [Real compound interest calculator](https://tendenciasfx.com/en/tools/compound-interest-calculator/): Calculates what an investment with compound interest is worth in today's money, with the official inflation of the United States, the United Kingdom, Canada, Australia, India and Nigeria, fees and three return scenarios; open data in `inflation-en.json`. - [Lot size calculator](https://tendenciasfx.com/en/tools/lot-size-calculator/): Works out the lot size in MetaTrader from your risk and your stop, in currency pairs, gold, silver and indices, and how many losses in a row are normal for a given win rate; open data in `tipos.json`. - [Currency strength meter](https://tendenciasfx.com/en/tools/currency-strength-meter/): Ranks the 23 currencies of the TendenciasFX model every week by fundamentals (each currency's rank by its economy) and by price (its average change against the other 22 over 1, 4 and 12 weeks), and flags where the two disagree; open data in `fuerza.json` and `fuerza.csv`. - [Forex market hours](https://tendenciasfx.com/en/tools/forex-market-hours/): Tells when the currency market opens and closes, and when the daily and weekly candles close, in each country, with the clock change already counted; everything is calculated in the browser and there is no downloadable data. - [Forex signals for the 7 major pairs](https://tendenciasfx.com/en/tools/forex-signals/): Shows the TendenciasFX Signal of the 7 major pairs (EURUSD, GBPUSD, USDJPY, USDCHF, AUDUSD, USDCAD and NZDUSD), which side it is on, the month it started and the rank of its currencies among the 23 in the model; it doesn't say when to enter; open data in `senales.json` and `senales.csv`. - [Forex correlation](https://tendenciasfx.com/en/tools/forex-correlation/): Pearson correlation table between 28 pairs of the 8 main currencies, daily (1, 3 and 6 months) and weekly (6 months, 1 year and 2 years), with a pair search and the European Central Bank's reference rates to redo any cell; open data in `correlacion.json` and `correlacion.csv`. ## Open data (JSON and CSV) - [inflation-en.json](https://tendenciasfx.com/herramientas/_datos/inflation-en.json): Yearly inflation of six countries, for the real compound interest calculator. Sources: BLS of the United States (public domain), ONS of the United Kingdom (Open Government Licence v3.0), Statistics Canada (Open Licence), ABS of Australia (CC BY 4.0) and the World Bank for India and Nigeria (CC BY 4.0). - [tipos.json](https://tendenciasfx.com/herramientas/_datos/tipos.json): Reference exchange rates for every business day, for the lot size calculator. Sources: European Central Bank (free use citing the ECB) and Frankfurter (public central-bank data, shared for information only, with no warranty); cross rates are calculated by TendenciasFX. - [fuerza.json](https://tendenciasfx.com/herramientas/_datos/fuerza.json): Currency strength. Sources: TendenciasFX's own model (only each currency's rank is published, nothing else) and the European Central Bank's reference rates. Licence: Free to use with credit to TendenciasFX (tendenciasfx.com) and the European Central Bank. For information only: it is not investment advice. - [fuerza.csv](https://tendenciasfx.com/herramientas/_datos/fuerza.csv): the same data as `fuerza.json`, in CSV (comma separator, point as decimal). - [senales.json](https://tendenciasfx.com/herramientas/_datos/senales.json): The Signal of the 7 major pairs. Sources: TendenciasFX's own model (only the Signal, its side, the month it started and each currency's rank are published, nothing else). Licence: Free to use with credit to TendenciasFX (tendenciasfx.com). For information only: it is not investment advice and it doesn't say when to enter. - [senales.csv](https://tendenciasfx.com/herramientas/_datos/senales.csv): the same data as `senales.json`, in CSV (comma separator, point as decimal). - [correlacion.json](https://tendenciasfx.com/herramientas/_datos/correlacion.json): Forex correlation. Sources: European Central Bank reference exchange rates; the correlation is calculated by TendenciasFX. Licence: Free to use with credit to TendenciasFX (tendenciasfx.com) and the European Central Bank. For information only: it is not investment advice. - [correlacion.csv](https://tendenciasfx.com/herramientas/_datos/correlacion.csv): the same data as `correlacion.json`, in CSV (comma separator, point as decimal). ## Optional - [Tools index](https://tendenciasfx.com/en/tools/): the list of the nine tools, with a short description of each. - [Full text](https://tendenciasfx.com/en/tools/llms-full.txt): the main text of every tool, all together. - [Sitemap](https://tendenciasfx.com/en/tools/sitemap.xml): every page of the English tools. - [Versión en español](https://tendenciasfx.com/herramientas/llms.txt): the same tools, in Spanish.