OpenBB SDKReferenceCryptoOvewfewfModelChartScrapes exchange withdrawal feesSource Code: [link]openbb.crypto.ov.ewf()ParametersThis function does not take any parameters.ReturnsTypeDescriptionpd.DataFrameExchange, Coins, Lowest, Average, Median, HighestExchange withdrawal feesSource Code: [link]openbb.crypto.ov.ewf_chart(export: str = "", sheet_name: Optional[str] = None)ParametersNameTypeDescriptionDefaultOptionalexportstrExport dataframe data to csv,json,xlsx fileTrueReturnsThis function does not return anything