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--- express-generator:fetch-js [2026/02/22 08:07] – Miroslav Popov
+++ express-generator:fetch-js [2026/05/29 10:23] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== Fetcher (fetch.js) ======
-**fecth.js** - downloads historical data from the provided sources, Forex rates, symbols information, and updates Express Generator.
+**fetch.js** downloads historical market data, updates Forex rates, refreshes symbol information, and checks for Express Generator updates.
+If you are new to ExGen, begin with [[quick-start|Quick Start]] and return here for full option coverage.
-==== Quick Start ====
+===== What Fetcher Does =====
-=== Fetch historical data ===
+Fetcher can run one or more of these jobs in a single command:
+  * Download Forex rates (**fx_rates**)
+  * Download symbol information (**symbol_info**)
+  * Download historical market data (**symbol**, **period**)
+  * Check and optionally install Express Generator updates (**check_for_update**)
-Command:
+If all jobs are disabled, Fetcher exits with "Nothing to fetch!".
-    express-generator> node ./bin/fetch.js --server MetaQuotes --symbol EURUSD --period M15
+You can fetch data only from servers provided by the developers (Forex Software Ltd).
-Output:
+Currently available servers are: //Premium//, //Dukascopy//, //MetaQuotes//, //Darwinex//, //Eightcap//, //BlackBull//.
-             ..:: Express Generator Fetch v2.70 ::..
-    Fetched: MetaQuotes EURUSD M15, From: 2018-02-02 09:45, To: 2026-02-20 21:30, Bars: 200000
-    Data fetch ready!
+Note: Premium data is composed from Dukascopy tick data sources.
-=== Update the local meta data ===
+===== Quick Start =====
-Fetch Forex rates and symbol information
+Recommended first run order for new users:
-Command:
+  * Update metadata first (FX rates and symbol info)
+  * Fetch historical data
+  * Continue with strategy generation in [[gen-js|Generator (gen.js)]]
-    express-generator> node ./bin/fetch.js --server MetaQuotes --fx-rates true --symbol-info true
+==== Fetch historical data ====
-Output:
+<code bash>
-             ..:: Express Generator Fetch v2.70 ::..
+node ./bin/fetch.js --server MetaQuotes --symbol EURUSD --period M15
+</code>
-    FX rates fetch ready!
-    Symbol info fetch ready!
+Example output:
+<code>
+..:: Express Generator Fetch v2.xx ::..
+Fetched: MetaQuotes EURUSD M15, From: 2018-02-02 09:45, To: 2026-02-20 21:30, Bars: 200000
+Data fetch ready!
+</code>
+==== Update local metadata (FX rates + symbol info) ====
+<code bash>
+node ./bin/fetch.js --server MetaQuotes --fx-rates true --symbol-info true
+</code>
+Example output:
+<code>
+..:: Express Generator Fetch v2.xx ::..
+FX rates fetch ready!
+Symbol info fetch ready!
+</code>
+==== Check for updates only ====
+<code bash>
+node ./bin/fetch.js --check-for-update true --update-check-interval 0
+</code>
+===== Settings and Priority =====
+Fetcher reads options in this order (lowest to highest priority):
+  * Default file: ''./bin/fetch.settings.ini''
+  * User settings file(s): ''--settings my-fetch.ini'' (or multiple files)
+  * CLI options: for example ''--time-zone -4''
+Higher priority overrides lower priority.
+When using several files with ''--settings'', each next file overrides keys from the previous one.
+Settings names are flexible in INI and CLI:
+  * snake_case
+  * camelCase
+  * PascalCase
+Aliases are supported:
+  * ''symbol'' and ''symbols''
+  * ''period'' and ''periods''
+  * ''settings'' and ''setting''
+===== Command Reference =====
+==== Core options ====
+^ Option ^ Type ^ Default ^ Description ^
+| ''--server'' | string | ''Premium'' | Data server. Allowed values: Premium, Dukascopy, MetaQuotes, Darwinex, Eightcap, BlackBull. |
+| ''--symbol'' / ''--symbols'' | string or list | empty | One or more symbols to download, for example ''EURUSD GBPUSD''. |
+| ''--period'' / ''--periods'' | string or list | ''M30'' | One or more periods: M1, M5, M15, M30, H1, H4, D1. |
+| ''--time-zone'' | integer | ''0'' | Time zone offset in hours where UTC = 0. |
+| ''--max-data-bars'' | integer | ''0'' | Maximum bars to keep. Use 0 for all available bars. |
+| ''--if-missing-or-older-than'' | integer | ''0'' | Re-download data only if file is missing or older than N minutes. 0 disables this rule. |
+| ''--silent'' | boolean | ''false'' | Suppress regular console output (errors are still shown). |
+Network behavior note:
+  * If a fetch request fails with a transient network error (for example ''socket hang up''), Fetcher retries automatically after 3 seconds, up to 2 retries.
+==== Metadata options ====
+^ Option ^ Type ^ Default ^ Description ^
+| ''--fx-rates'' | boolean | ''false'' | Downloads ''fx-rates.json'' in ''./res''. |
+| ''--symbol-info'' | boolean | ''false'' | Downloads symbol info file ''./res/<server>.json''. |
+==== Update options ====
+^ Option ^ Type ^ Default ^ Description ^
+| ''--check-for-update'' | boolean | ''true'' | Enables update check at startup. |
+| ''--automatic-update'' | boolean | ''true'' | Installs update automatically when a newer version is found. |
+| ''--update-check-interval'' | integer | ''24'' | Hours between update checks. |
+==== Settings file options ====
+^ Option ^ Type ^ Description ^
+| ''--settings'' | string or list | One or more user INI files that override default settings. |
+| ''--setting'' | string or list | Alternative spelling for ''--settings''. |
+===== Output and Files =====
+  * FX rates are saved in ''./res/fx-rates.json''
+  * Symbol info is saved in ''./res/<server>.json''
+  * Historical data is saved in the data directory under ''./data''
+  * Update check timestamp is stored in ''./bin/res/update-check.json''
+===== Related pages =====
+  * [[fetch-forex-rates|Forex rates and symbol info]]
+  * [[fetch-data|Fetch historical data]]
+  * [[fetch-update|Update Express Generator]]
+  * [[settings-files|Settings files]]

forex software

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