protected override async Task <ExchangeOrderBook> OnGetOrderBookAsync(string marketSymbol, int maxCount = 100)
{
var token = await MakeRequestOkexAsync(marketSymbol, $"/spot/v3/instruments/{marketSymbol}/book", BaseUrlV3);
return(ExchangeAPIExtensions.ParseOrderBookFromJTokenArrays(token.Item1, maxCount: maxCount));
}