Log(exchange.GetRecords(PERIOD_M3).length);

실행 결과:

3분, K선, 3개만 돌려주면 되죠?
여러번 테스트를 해봤는데, 항상 그렇고, 가끔씩 2개를 돌려주기도 합니다.
다른 기간은 정상입니다.

3개 밖에 없는데... 한개만.

Log(JSON.stringify(exchange.GetRecords(PERIOD_M3)))

[{"Time":1543387860000,"Open":0.028514,"High":0.028588,"Low":0.028514,"Close":0.028539,"Volume":489.0600000000003},
{"Time":1543388040000,"Open":0.028548,"High":0.028572,"Low":0.02849,"Close":0.028522,"Volume":367.2560000000004},
{"Time":1543388220000,"Open":0.028531,"High":0.028531,"Low":0.028517,"Close":0.028528,"Volume":16.34800000000007}]