用mt4,mql4编写ea指标

一共二条线
线一：(（9日最高价+9日最低价）/2+(26日最高价+26日最低价)/2）/2
线二：(52日最高价+52日最低价)/2
求4个值
当线一上穿线二时：取线一的最高价，取线二的最低价
当线一下穿线二时：取线一的最低价，取线二的最高价

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