Search AFL library at amibroker.com.
As per ur requirements, I feel this one should work in the meantime!
_SECTION_BEGIN("Ensign Volatility Stop");
// Ensign Volatility Stop
// get the multiple of 9 period EMA of ATR_Ensign
k=Param("multiplication factor", 1,0.5,5,0.1);
period=k*9;
VS_raw = 2.5 * EMA(ATR(1), period);
// for longs, VS line is below price
loline = VS_below_price = HHV(Close, period) - VS_raw;
// for shorts, VS line is above price
hiline = VS_above_price = LLV(Close, period) + VS_raw;
between = IIf (C < hiline AND C > loline, 1, 0);
up = IIf(C > hiline OR (H > Ref(H, -1) AND H > hiline), 1, 0);
dn = IIf(C < loline OR (L < Ref(L, -1) AND L < loline), 1, 0);
upcond = IIf(between AND BarsSince(up) < BarsSince(dn) , 1, 0);
dncond = IIf(between AND BarsSince(dn) < BarsSince(up) , 1, 0);
upline = IIf(up OR upcond, loline, Null);
dnline = IIf(dn OR dncond, hiline, Null);
Plot(C, "", colorLightGrey, styleBar);
Plot(upline, "", colorGreen, styleStaircase) ;
Plot(dnline, "", colorRed, styleStaircase) ;
Buy=upline;
Sell=dnline;
Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);
PlotShapes(Buy*shapeUpArrow,colorGreen);
PlotShapes(Sell*shapeDownArrow,colorRed);
/**** END ****/
_SECTION_BEGIN("Background");
SetChartOptions(0,chartShowArrows|chartShowDates);
if( ParamToggle("Tooltip shows", "All Values|Only Prices" ) )
{
ToolTip=StrFormat("Open: %g\nHigh: %g\nLow: %g\nClose: %g
(%.1f%%)\nVolume: "+NumToStr( V, 1 ), O, H, L, C, SelectedValue( ROC( C, 1
)));
}
SetChartBkColor(ParamColor("Outer panel color ",colorBlack)); // color of outer border
SetChartBkGradientFill( ParamColor("Inner panel color upper half",colorDarkTeal),
ParamColor("Inner panel color lower half",colorBlack)//color of inner panel
,ParamColor("behind Text Color", colorRed));
_SECTION_END();
