AFL Library

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Details:

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Description:

i use to do intra day trading in Indian stocks & commodity market.

Formula:

_SECTION_BEGIN("Price ADX");
function PercentR( periods )
{ return -100 * ( HHV( H, periods ) - C )/( HHV( H, periods ) - LLV( L, periods
) ); }
range = Param("Periods", 14, 2, 200, 1 );
 ADX(range);
 PDI(range) ;
 MDI(range);
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g,
Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +" {{VALUES}}", O, H, L, C,
SelectedValue( ROC( C, 1 )) ));
Plot( C, "Close", IIf( PDI(range) > MDI(range), ParamColor("Up Color",
colorGreen ), ParamColor("Down Color", colorRed ) ), styleNoTitle |
ParamStyle("Style") | GetPriceStyle() ); 
Bull_Trend=(PercentR( Param("Periods", 14, 2, 100 ) )> -30);
Bear_Trend=(PercentR( Param("Periods", 14, 2, 100 ) )< -70);
Ribbon_kol=IIf( Bull_Trend, colorGreen, IIf(Bear_Trend, colorRed,colorYellow))
;
Plot(6, "ribbon", Ribbon_kol, styleOwnScale| styleArea|
styleNoLabel,-0.5,100);
_SECTION_END();

_SECTION_BEGIN("DispMA");
P = ParamField("Field");
Type = ParamList("Type", "Simple,Exponential,Double Exponential,Tripple
Exponential,Wilders,Weighted");
Periods = Param("Periods", 30, 2, 100 );
Displacement = Param("Displacement", 15, -50, 50 );
SL= (HHV(H,13)+LLV(L,13))/2;
TL= (HHV(H,9)+LLV(L,9))/2;
m = Ref((SL+TL)/2,-2);
if( Type == "Simple" ) 					m = MA( P, Periods );
if( Type == "Exponential" ) 			m = EMA( P, Periods );
if( Type == "Double Exponential" ) 	m = DEMA( P, Periods );
if( Type == "Tripple Exponential" ) 	m = TEMA( P, Periods );
if( Type == "Wilders" ) 				m = Wilders( P, Periods );
if( Type == "Weighted" ) 				m = WMA( P, Periods );

Plot( m, _DEFAULT_NAME(), IIf( C > m, ParamColor("Up Color", colorGreen ),
ParamColor("Down Color", colorRed ) ), styleLine, 0, 0, Displacement );
_SECTION_END();

  /* **********************************

Code to automatically identify pivots

********************************** */
// -- what will be our lookback range for the hh and ll?
farback=Param("How Far back to go",100,50,5000,10);
nBars = Param("Number of bars", 12, 5, 40);
// -- Title.
Title = Name() + " (" + StrLeft(FullName(), 15) + ") O: " + Open + ", 
H: " + High + ", L: " + Low + ", C: " + Close;
// -- Plot basic candle chart
PlotOHLC(Open, High, Low, Close, 
"BIdx = " + BarIndex() + 
"\n" + "O = " + O + "\n"+"H = "+ H + "\n"+"L = " + L 
+ "\n"+"C ",
colorBlack, styleCandle); 
GraphXSpace=7;
// -- Create 0-initialized arrays the size of barcount
aHPivs = H - H;
aLPivs = L - L;
// -- More for future use, not necessary for basic plotting
aHPivHighs = H - H;
aLPivLows = L - L;
aHPivIdxs = H - H;
aLPivIdxs = L - L;
nHPivs = 0;
nLPivs = 0;
lastHPIdx = 0;
lastLPIdx = 0;
lastHPH = 0;
lastLPL = 0;
curPivBarIdx = 0;
// -- looking back from the current bar, how many bars 
// back were the hhv and llv values of the previous 
// n bars, etc.?
aHHVBars = HHVBars(H, nBars);
aLLVBars = LLVBars(L, nBars);
aHHV = HHV(H, nBars);
aLLV = LLV(L, nBars);
// -- Would like to set this up so pivots are calculated back from
// last visible bar to make it easy to "go back" and see the pivots
// this code would find. However, the first instance of 
// _Trace output will show a value of 0
aVisBars = Status("barvisible");
nLastVisBar = LastValue(Highest(IIf(aVisBars, BarIndex(), 0)));
_TRACE("Last visible bar: " + nLastVisBar);
// -- Initialize value of curTrend
curBar = (BarCount-1);
curTrend = "";
if (aLLVBars[curBar] < 
aHHVBars[curBar]) {
curTrend = "D";
}
else {
curTrend = "U";
}
// -- Loop through bars. Search for 
// entirely array-based approach
// in future version
for (i=0; i<farback; i++) {
curBar = (BarCount - 1) - i;
// -- Have we identified a pivot? If trend is down...
if (aLLVBars[curBar] < aHHVBars[curBar]) {
// ... and had been up, this is a trend change
if (curTrend == "U") {
curTrend = "D";
// -- Capture pivot information
curPivBarIdx = curBar - aLLVBars[curBar];
aLPivs[curPivBarIdx] = 1;
aLPivLows[nLPivs] = L[curPivBarIdx];
aLPivIdxs[nLPivs] = curPivBarIdx;
nLPivs++;
}
// -- or current trend is up
} else {
if (curTrend == "D") {
curTrend = "U";
curPivBarIdx = curBar - aHHVBars[curBar];
aHPivs[curPivBarIdx] = 1;
aHPivHighs[nHPivs] = H[curPivBarIdx];
aHPivIdxs[nHPivs] = curPivBarIdx;
nHPivs++;
}
// -- If curTrend is up...else...
} 
// -- loop through bars
} 
// -- Basic attempt to add a pivot this logic may have missed
// -- OK, now I want to look at last two pivots. If the most 
// recent low pivot is after the last high, I could
// still have a high pivot that I didn't catch
// -- Start at last bar
curBar = (BarCount-1);
candIdx = 0;
candPrc = 0;
lastLPIdx = aLPivIdxs[0];
lastLPL = aLPivLows[0];
lastHPIdx = aHPivIdxs[0];
lastHPH = aHPivHighs[0];
if (lastLPIdx > lastHPIdx) {
// -- Bar and price info for candidate pivot
candIdx = curBar - aHHVBars[curBar];
candPrc = aHHV[curBar]; 
if (
lastHPH < candPrc AND
candIdx > lastLPIdx AND
candIdx < curBar) {
// -- OK, we'll add this as a pivot...
aHPivs[candIdx] = 1;
// ...and then rearrange elements in the 
// pivot information arrays
for (j=0; j<nHPivs; j++) {
aHPivHighs[nHPivs-j] = aHPivHighs[nHPivs-
(j+1)];
aHPivIdxs[nHPivs-j] = aHPivIdxs[nHPivs-(j+1)];
}
aHPivHighs[0] = candPrc ;
aHPivIdxs[0] = candIdx;
nHPivs++;
} 
} else {
// -- Bar and price info for candidate pivot
candIdx = curBar - aLLVBars[curBar];
candPrc = aLLV[curBar]; 
if (
lastLPL > candPrc AND
candIdx > lastHPIdx AND
candIdx < curBar) {
// -- OK, we'll add this as a pivot...
aLPivs[candIdx] = 1;
// ...and then rearrange elements in the 
// pivot information arrays
for (j=0; j<nLPivs; j++) {
aLPivLows[nLPivs-j] = aLPivLows[nLPivs-(j+1)];
aLPivIdxs[nLPivs-j] = aLPivIdxs[nLPivs-(j+1)];
}
aLPivLows[0] = candPrc;
aLPivIdxs[0] = candIdx;
nLPivs++;
}
}
// -- Dump inventory of high pivots for debugging
/*
for (k=0; k<nHPivs; k++) {
_TRACE("High pivot no. " + k
+ " at barindex: " + aHPivIdxs[k] + ", " 
+ WriteVal(ValueWhen(BarIndex()==aHPivIdxs[k], 
DateTime(), 1), formatDateTime)
+ ", " + aHPivHighs[k]);
}
*/
// -- OK, let's plot the pivots using arrows
PlotShapes(IIf(aHPivs==1, shapeDownArrow, shapeNone), colorRed, 0, High,
Offset=-15);
PlotShapes(IIf(aLPivs==1, shapeUpArrow , shapeNone), colorBlue, 0, Low,
Offset=-15);

_SECTION_BEGIN("Bollinger Bands");
P = ParamField("Price field",-1);
Periods = Param("Periods", 15, 2, 100, 1 );
Width = Param("Width", 2, 0, 10, 0.05 );
Color = ParamColor("Color", colorCycle );
Style = ParamStyle("Style");
Plot( BBandTop( P, Periods, Width ), "BBTop" + _PARAM_VALUES(), Color, Style );

Plot( BBandBot( P, Periods, Width ), "BBBot" + _PARAM_VALUES(), Color, Style );

_SECTION_END();

_SECTION_BEGIN("EMA1");
P = ParamField("Price field",-1);
Periods = Param("Periods", 15, 2, 200, 1, 10 );
Plot( EMA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ),
ParamStyle("Style") ); 
_SECTION_END();

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