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《21日間の取引入門からマスターまで》第17課-トレーディングシステムの精巧化-左側取引！
https://gateio.onelink.me/gj8h/gatelive?session_id=d92b54ab285b4380846734e81aa2f291-1739554924&video_id=0346053f0a323e0a17f93676f94e86aa&ref=AQBNVGOO&ref_type=104