AA:=EMA(IF(REF(LOW,1)-LOW>0 AND REF(LOW,1)-LOW>HIGH-REF(HIGH,1),REF(LOW,1)-LOW,0),15);
AB:=EMA(MAX(MAX(HIGH-LOW,ABS(HIGH-REF(CLOSE,1))),ABS(REF(CLOSE,1)-LOW)),15);
AC:=EMA(IF(HIGH-REF(HIGH,1)>0 AND HIGH-REF(HIGH,1)>REF(LOW,1)-LOW,HIGH-REF(HIGH,1),0),15);