Download Data

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1. Set the asset class, source and market.
2. A preset previews its proposed symbols.
3. Add the preset to the selection or replace the current selection.

Choose the provider or exchange, market, and symbol in the download panel. A spot instrument and a futures instrument with the same ticker are separate data series. Available choices come from EngineHost.

If a symbol is missing, refresh the Data view and verify the selected provider and market before entering another ticker.

Use Download Data to request the required history. Watch the queue and status messages; an engine operation can delay a queued download. Use the offered cancellation action when necessary and wait for the task to report its final state. The final summary counts updated, failed, and cancelled datasets separately. If a download fails, the message includes the first error; Open Log shows the details for every dataset.

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1. Download boundaries.
2. Review the instrument list.
3. Queue the selection.

The Data view provides update-tail and full-history actions where supported. Right-click a pair, market, exchange or asset-class branch: candle operations apply to all pairs inside that branch, including pairs without downloaded history. Overlapping selected branches and pairs are processed once.

Memory and startup-memory settings, charts, import/export and deletion use the same branch scope; deletion retains its confirmation of the exact pair list. Integrity verification retains its group audit. Empty branches never fall back to other data. Downloads depend on the source’s history depth, connectivity, rate limits, and EngineHost capabilities.

Help loads from the XTester website; reading an article does not start a market-data download.

Inspect the available first and last candle dates and choose a simulation interval inside the downloaded range. Higher timeframes are derived from available history; gaps or insufficient warm-up data can affect indicators and results.

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1. Coverage score for the selected interval.

In Simulation Settings, choose Check data quality to report on the selected interval. It reads local minute candles and counts usable and missing minute slots. A score of 100/100 means complete structural coverage for this interval; it does not certify price accuracy or execution.

The data integrity check in the Data tree can download missing history. Follow it in Downloads. Stopping the queue preserves data already saved.

Deleting history removes local data for the selected instrument. Refreshing the view does not restore deleted data. Download it again if you still need it.

Use get_market_data_capabilities in MCP/Copilot, optionally filtering by exchange, market or providerId. Without filters it returns the complete catalog. C# strategies use MarketDataSourceCatalog.Find; get_strategy_api_doc returns the exact signatures.

History and live are independent: range downloads, a recent batch or daily archives; minute-candle streams or polling. Archive input resolution is separate from the resolution delivered by the current adapter. Existing sub-minute archives currently import into minute candles.

HostAvailable means implementation code is included in the current host. It does not verify connectivity, period coverage or credentials. Discovery neither downloads data nor authorizes emulation. C# strategies can request refinement of a closed interval with context.DataRefinement().Require. Confirmed no-trade intervals do not require fabricated candles.