Address the issue where the default `fetchOHLCV` limit of 1500 for Binance Futures results in excessive API weight (10) and causes slow downloads and heavy rate limiting. The implicit request is to allow configuration or optimize this default.
### Preliminary Checks - [x] I have already searched for [existing issues](https://github.com/ccxt/ccxt/issues) and confirmed that this issue is not a duplicate ### Is your feature request related to a problem? Please describe ## Description The default `fetchOHLCV` limit for Binance Futures is set to 1500, which has a very high API weight of 10. This causes slow downloads and heavy rate limiting. ## Current Behavior ```javascript 'forDerivatives': { 'fetchOHLCV': { 'limit': 1500 } } ``` - Limit: 1500 ### Describe the solution you'd like The default fetchOHLCV limit for Binance Futures is set to 1500... Reduce to 499. ### Describe alternatives you've considered **Binance Futures: fetchOHLCV default limit of 1500 causes excessive API weight**