{参数: N(0,100,26),N1(0,100,9),P(0,10,2);}

LC := REF(CLOSE,1);
RSI:SMA(MAX(CLOSE-LC,0),N1,1)/SMA(ABS(CLOSE-LC),N1,1)*100;
MID : MA(RSI,N);
UPPER: MID + P*STD(RSI,N);
LOWER: MID - P*STD(RSI,N);