[N,1,20,5]

TR:=MAX(MAX((HIGH-LOW),ABS(REF(CLOSE,1)-HIGH)),ABS(REF(CLOSE,1)-LOW));
R:=MA(TR,10);
Z:=REF(HHV(HIGH,N),1);
D:=REF(LLV(LOW,N),1);
Z-CLOSE>=2*R,SPK;
CLOSE-D>=2*R,BPK;