[Bug/Limit] OKX API returns Error 51000 "Parameter bar error" when interval is set to "1s"

[angelachanc91-star]

Possible Cause (Hypothesis) ：I suspect that the OKX Public REST API (/api/v5/market/candles) might not support 1s granularity. Based on the error code 51000, it seems that 1s is treated as an invalid parameter by the exchange endpoint. I am not entirely sure if this requires a different endpoint (e.g., WebSocket) or if the 1s interval is simply not supported for historical data fetching.

[vcfgv]

Yes, your hypothesis is correct.

We currently plan to remove this in PR #505 because:

• This parameter is not widely supported across different exchanges (as seen here with OKX).
• The granularity is too fine, making its reference value doubtful for general use cases.

Thank you for bringing this up

[angelachanc91-star]

by the way,I noticed frequent 307 Temporary Redirect entries in the logs. It appears that the frontend is requesting APIs without a trailing slash (e.g., /api/v1/strategies), which triggers the backend's automatic redirection. Although this is a low-priority issue that doesn't affect functionality, I still suggest appending the / to the request URL, as this will eliminate the extra round-trip and clean up the warning logs.

Yes, your hypothesis is correct.

We currently plan to remove this in PR #505 because:

• This parameter is not widely supported across different exchanges (as seen here with OKX).
• The granularity is too fine, making its reference value doubtful for general use cases.

Thank you for bringing this up

[vcfgv]

by the way,I noticed frequent 307 Temporary Redirect entries in the logs. It appears that the frontend is requesting APIs without a trailing slash (e.g., /api/v1/strategies), which triggers the backend's automatic redirection. Although this is a low-priority issue that doesn't affect functionality, I still suggest appending the / to the request URL, as this will eliminate the extra round-trip and clean up the warning logs.

@DigHuang Take a look at this.