v1:c,linethick4; v2:reverse(v1),linethick4; v3:c/4,linethick1; v4:reverse(v3),linethick1; zx:(v1+v2)/2; MA3:MA(CLOSE,3); MA5:MA(CLOSE,5); MA10:MA(CLOSE,10); ma20:ma(close,20);
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