NR7 Amibroker AFL and NR4 Amibroker AFL with Exploration

NR7 implies Narrow Range computed for last 7 bars. The NR7 applied on a daily timeframe
tends to be more effective . However intraday traders even use it for 4 hourly or hourly  time frame to gauge the probability of some violent movement due to volatility squeezing for a considerable period of time. Due to high volatility leading to low volatility and vice versa Narrow ranges lead to
range expansion . Some traders also use NR4 for entering into low volatility periods. Below AFL as provided by the author of the AFL makes the task very easy to identify the NR4 & NR7 stocks through exploration. 

Copy The Code Give Below:

_SECTION_BEGIN("NR7");

/*********** NR7 System for Chart and Exploration ***********************/

R = H - L;
NR7 = False;
NR4 = False;
m7 = m4 = idm7 = idm4 = idm = 0;

for(i = 7; i < BarCount; i++)
{
if( R[i] < R[i - 1] AND R[i] < R[i -2] AND R[i] < R[i - 3] AND R[i] < R[i - 4] AND R[i] < R[i - 5] AND R[i] < R[i - 6])
{
NR7[i] = True;
m7[i] = 1;
}
}

for(i = 4; i < BarCount; i++)
{
if((R[i] < R[i - 1] AND R[i] < R[i -2] AND R[i] < R[i - 3] ) AND NOT NR7[i])
{
NR4[i] = True;
m4[i] = 1;
}
}
IDNR7 = Inside() * NR7;
IDNR4 = Inside() * NR4;
ID = Inside();
idm7 = IIf(IDNR7, 1, 0);
idm4 = IIf(IDNR4, 1, 0);
idm = IIf(id, 1, 0);

for(i = 1; i < BarCount; i++)
{
if(IDNR7[i] == IDNR7[i - 1]) idm7[i] = idm7[i] + idm7[i - 1];
if(IDNR4[i] == IDNR4[i - 1]) idm4[i] = idm4[i] + idm4[i - 1];
if(NR7[i] == NR7[i - 1]) m7[i] = m7[i] + m7[i - 1];
if(NR4[i] == NR4[i - 1]) m4[i] = m4[i] + m4[i - 1];
if(ID[i] == ID[i - 1]) idm[i] = idm[i] + idm[i - 1];
}

MarkerIDNR7 = MarkerIDNR4 = shapeStar ;

Marker7 = shapeDigit7;
NR7Color = colorBrightGreen;

Marker4 = shapeDigit4;
NR4Color = colorLightOrange;

MarkerID = shapeHollowCircle;
IDColor = colorYellow;

IDNR7Color = colorBrightGreen;
IDNR4Color = colorLightOrange;

MarkerDist = L * 0.995;
IDNRDist = H * 1.03;

if(Status("action") == actionIndicator)
{
_N(Title = StrFormat("{{NAME}}, {{DATE}} ({{INTERVAL}}): {{VALUES}}") + ", Range=" + Prec(R + 0.00001, 2) + ","
+ WriteIf(IDNR7, EncodeColor(colorBrightGreen) + WriteIf(idm7 > 1, StrLeft(NumToStr(idm7), 4), "") + " IDNR7 ", "")
+ WriteIf(IDNR4, EncodeColor(colorLightOrange) + WriteIf(idm4 > 1, StrLeft(NumToStr(idm4), 4), "") + " IDNR4 ", "")
+ WriteIf(NR7 AND NOT ID, EncodeColor(colorBrightGreen) + WriteIf(m7 > 1, StrLeft(NumToStr(m7), 4), "") + " NR7 ", "")
+ WriteIf(NR4 AND NOT ID, EncodeColor(colorLightOrange) + WriteIf(m4 > 1, StrLeft(NumToStr(m4), 4), "") + " NR4 ", "")
+ WriteIf(ID AND NOT NR7 AND NOT NR4, EncodeColor(colorTurquoise) + WriteIf(idm > 1, StrLeft(NumToStr(idm), 4), "") + " Inside Day ", ""));

PlotOHLC(O, H, L, C, "Close", colorLightGrey, styleBar);
PlotShapes(IIf(IDNR7, MarkerIDNR7, shapeNone), IDNR7Color, 0, IDNRDist);
PlotShapes(IIf(IDNR4 AND NOT IDNR7, MarkerIDNR4, shapeNone), IDNR4Color, 0, IDNRDist);
PlotShapes(IIf(NR7 AND NOT ID, Marker7, shapeNone), NR7Color, 0, MarkerDist);
PlotShapes(IIf(NR4 AND NOT NR7 AND NOT ID, Marker4, shapeNone), NR4Color, 0, MarkerDist);
PlotShapes(IIf(ID AND NOT NR7 AND NOT NR4, MarkerID, shapeNone), IDColor, 0, IDNRDist);
}

if(Status("action") == actionExplore)
{
Filter = (m7 > 0) OR (m4 > 0) OR (idm > 0);

SetOption("NoDefaultColumns", True);

AddColumn(DateTime(), "DATE", formatDateTime, colorDefault, colorDefault, 96);
AddTextColumn(Name(), "SYMBOL", 77, colorDefault, colorDefault, 120);
AddColumn(R, "Range", 6.2, colorDefault, colorDefault, 84);
AddColumn(IIf(idm, 48 + idm, 32), "INSIDE", formatChar, colorYellow, IIf(idm, colorLightBlue, colorDefault));
AddColumn(IIf(m4, 48 + m4, 32), "NR4", formatChar, colorYellow, IIf(m4, colorBlue, colorDefault));
AddColumn(IIf(m7, 48 + m7, 32), "NR7", formatChar, colorYellow, IIf(m7, colorGreen, colorDefault));
}

/************************** END OF AFL CODE *****************************/

_SECTION_END();