GetRecords has a lot of transaction pairs that don't get to the k-line

Let i = 0; i < symbolList.length; i++) { exchange.IO ((currency tag, symbolList[i]) Let records = _C (exchange.GetRecords, period) Log (Current K-line) (Latest) log, records[records.length-1], log on a K-line log, records[records.length-2]) I'm not sure. When using multiple trading pairs in the strategy, only a few trading pairs such as XBT, ETH, XRP, DOT can return k-line data

The other transaction pairs that are returned are empty arrays, and the same is true when testing a transaction pair separately.

Examined to rule out exchange API frequency limitations and symbol input errors

想请教下是不是exchange.GetRecords只支持这几个有限的交易对？