// FROM AMIBROKER FORUMS Here we go:
_SECTION_BEGIN("Squeesy");
/*
BB Squeeze (conversion for TS code)
 

Instructions
 Insert Linked to new chart pane
 Periods can be selected in Param window
*/

Price = Close;
Length = Param("Length",20,2,100,1); // { Length for Average True Range (ATR)}
Lenght1 = Param("Length1",20,2,100,1); // {  Std. Deviation (SD) Calcs }

nK = Param("Channel ATRs",1.5,0.1,2,0.1); //{ Keltner Channel ATRs from Average }
nBB = Param("BB Std Devs",2,0.1,3,0.1); // { Bollinger Band Std. Devs. from Average }
AlertLine = Param("AlertLine",1,0,3,1); //{ BBS_Index level at which to issue alerts }

NormalColor = colorRed; //{ Normal color for BBS_Ind }
AlertlColor = colorBlue; //{ Color for BBS_Ind below alert line }


LHMult = Nz(PointValue/TickSize);

//{-- Calculate BB Squeeze Indicator ----------------------}
AvgTrueRange = ATR(Length);
SDev = StDev(Price, Length);

Denom = nK*AvgTrueRange;
BBS_Ind = Nz((nBB * SDev) /Denom); 

SetPlotColor = IIf( BBS_Ind < Alertline, NormalColor, AlertlColor);
BBcrossDown = Cross(AlertLine,BBS_Ind);
BBcrossUp = Cross(BBS_Ind,AlertLine);

SetChartOptions( 0, chartShowDates|chartWrapTitle ); 
GraphXSpace=10;
//_N(Title = "{{NAME}} - {{INTERVAL}} {{DATE}} "+_DEFAULT_NAME()+" : {{OHLCX}} {{VALUES}}");
//+"\nALERT: "+WriteIf(BBcrossDown,"BB Squeeze Alert",WriteIf (BBcrossUp,"BB Squeeze Is Over","")) );


//{-- Plot the Index & Alert Line -------------------------}
Plot(0, "BBS_Ind", SetPlotColor, styleDots );

//{-- Plot delta of price from Donchian mid line ----------}
value2 = LinearReg( price-((HHV(H, Lenght1)+LLV(L, Lenght1))/2+ MA
(C,Lenght1))/2, Lenght1);
color = IIf( value2 > 0, IIf( value2 > Ref(value2,-1), colorGreen, 
colorDarkGreen),
IIf( value2 < 0, IIf( value2 < Ref(value2,-1), colorRed, 
colorDarkRed ), colorYellow ));

Plot(value2*LHMult, "NickmNxtMove", color, styleArea );
Plot(value2,"BB Squeeze",color, styleArea );
//{-- Issue Alert when the Squeeze is On ------------------}
"ALERT";
//Write alerts to Interpretation window
//Ticker = Name();
//WriteIf(BBcrossDown,Ticker + " " + "BB Squeeze Alert" ,WriteIf (BBcrossUp,Ticker + " " + "BB Squeeze Is Over",""));
 
//Write alerts to Alert Output window
AlertIf(BBcrossDown,"","BB Squeeze Alert",0);
AlertIf(BBcrossUp,"","BB Squeeze Is Over",0);

//Sound alerts
//AlertIf( BBcrossDown, "SOUND C:\\Windows\\Media\\RINGIN.WAV", "Audio alert", 2 );
//AlertIf( BBcrossUp, "SOUND C:\\Windows\\Media\\RINGIN.WAV", "Audio alert", 2 );


//Write text to screen
/*
for(i=1;i<BarCount;i++)
{
 if(BBcrossDown[i])
 {
  PlotText("BB Squeeze Alert",i,-6,colorWhite);
 }
 if(BBcrossUp[i])
 {
  PlotText("BB Squeeze Is Over",i,-3,colorWhite);
 }
}
*/
PlotShapes(shapeUpArrow*BBcrossDown,colorBrightGreen,0,0);
PlotShapes(shapeDownArrow*BBcrossup,colorBrightGreen,0,0);

_SECTION_END();