Backtest's Date Range too long can cause Request failed with status code 400

[Boreas813]

Describe the bug

SYMBOL: TSLA(US STOCK)
TIMEFRAME: 1H
Date Range: 2Y
Run Backtest return: Request failed with status code 400

SYMBOL: EURUSD(Forex)
TIMEFRAME: 15m
Date Range: >=3M
Run Backtest return: Request failed with status code 400

Can we import our offline price data for backtest?

Steps to reproduce

1. open Indicator IDE
2. set any stragtegy code and turn on label Backtest & Results
3. set symbol to EURUSD
4. set TIMEFRAME to 15m
5. set Date Range above 3M

Expected behavior

No response

Deployment method

Docker Compose

Relevant logs

[brokermr810]

已修复

[brokermr810]

Thank you for reporting the TSLA 1H and EURUSD 15m cases. An earlier maintainer response marked this fixed, but we have not independently verified both original configurations or the offline-import request. Longer intraday ranges remain subject to provider coverage and the application's bar-count limits; increasing the requested date range does not guarantee that the data exists.

The current backtest workflow uses Strategy API V2 and validates the allowed range. We are closing this older Indicator IDE report without promising unrestricted history or a general offline-import feature. If a request within the displayed limits still fails on the current version, please open a new issue with the provider, dates, symbol, response body, and redacted backend logs.