how i create in that afl buy sell signal in crossover condition ???
OscPds = Param("Osc periods", 10, 1, 260);
SmoothingPds = Param("Smoothing periods", 3, 1, 260, 3);
SignalPds = Param("Signal periods",5, 1, 260);
Trail = HHV(C - (L - HHV(C - (HHV(H, OscPds ) - LLV(L, OscPds)), OscPds)) / 2, OscPds);
JICD = EMA((C - Trail) / Trail * 100, SmoothingPds);
JICDSignal = EMA(JICD, SignalPds);
Plot(0, _DEFAULT_NAME(), colorBlack, styleLine);
Plot(JICDSignal, _DEFAULT_NAME(), colorRed, styleLine);
Plot(JICD, _DEFAULT_NAME(), colorBrightGreen, styleLine);
Filter = JICD > Trail AND Cross(JICDSignal, Trail);
AddColumn(C, "Close");