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EarnForex authored Mar 21, 2022
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140 changes: 140 additions & 0 deletions RangeExpansionIndex.mq4
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//+------------------------------------------------------------------+
//| RangeExpansionIndex.mq4 |
//| Copyright © 2010-2022, EarnForex.com |
//| https://www.earnforex.com/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010-2022, EarnForex.com"
#property link "https://www.earnforex.com/metatrader-indicators/Range-Expansion-Index/"
#property version "1.01"
#property strict

#property description "Calculates Tom DeMark's Range Expansion Index."
#property description "Going above 60 and then dropping below 60 signals price weakness."
#property description "Going below -60 and the rising above -60 signals price strength."
#property description "For more info see The New Science of Technical Analysis."

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 clrBlue
#property indicator_type1 DRAW_LINE
#property indicator_level1 60
#property indicator_level2 -60

enum enum_candle_to_check
{
Current,
Previous
};

input int REI_Period = 8; // REI Period
input bool EnableNativeAlerts = false;
input bool EnableEmailAlerts = false;
input bool EnablePushAlerts = false;
input enum_candle_to_check TriggerCandle = Previous;

// Buffers:
double REI[];

// Global variables:
datetime LastAlertTime = D'01.01.1970';

void OnInit()
{
IndicatorShortName("REI(" + IntegerToString(REI_Period) + ")");
IndicatorSetInteger(INDICATOR_DIGITS, 2);
SetIndexBuffer(0, REI);
SetIndexDrawBegin(0, REI_Period + 8);
}

int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &time[],
const double &open[],
const double &high[],
const double &low[],
const double &close[],
const long &tick_volume[],
const long &volume[],
const int &spread[])
{
// Too few bars to do anything.
if (Bars <= 8 + REI_Period) return 0;

int counted_bars = IndicatorCounted();
if (counted_bars > 0) counted_bars--;
int limit = Bars - counted_bars;
if (limit > Bars - (8 + REI_Period) - 1) limit = Bars - (8 + REI_Period) - 1;

for (int i = 0; i <= limit; i++)
{
double SubValueSum = 0;
double AbsDailyValueSum = 0;
for (int j = 0; j < REI_Period; j++)
{
SubValueSum += SubValue(i + j);
AbsDailyValueSum += AbsDailyValue(i + j);
}
if (AbsDailyValueSum != 0) REI[i] = SubValueSum / AbsDailyValueSum * 100;
else REI[i] = 0;
}

// Alerts
if (((TriggerCandle > 0) && (Time[0] > LastAlertTime)) || (TriggerCandle == 0))
{
string Text;
// Level 60
if ((REI[TriggerCandle] < 60) && (REI[TriggerCandle + 1] >= 60))
{
Text = "REI: " + Symbol() + " - " + StringSubstr(EnumToString((ENUM_TIMEFRAMES)Period()), 7) + " - Crossed 60 from above.";
if (EnableNativeAlerts) Alert(Text);
if (EnableEmailAlerts) SendMail("REI Alert", Text);
if (EnablePushAlerts) SendNotification(Text);
LastAlertTime = Time[0];
}
// Level -60
if ((REI[TriggerCandle] > -60) && (REI[TriggerCandle + 1] <= -60))
{
Text = "REI: " + Symbol() + " - " + StringSubstr(EnumToString((ENUM_TIMEFRAMES)Period()), 7) + " - Crossed -60 from below.";
if (EnableNativeAlerts) Alert(Text);
if (EnableEmailAlerts) SendMail("REI Alert", Text);
if (EnablePushAlerts) SendNotification(Text);
LastAlertTime = Time[0];
}
}

return rates_total;
}

//+------------------------------------------------------------------+
//| Calculate the Conditional Value |
//+------------------------------------------------------------------+
double SubValue(int i)
{
double diff1 = High[i] - High[i + 2];
double diff2 = Low[i] - Low[i + 2];
int num_zero1, num_zero2;

if ((High[i + 2] < Close[i + 7]) && (High[i + 2] < Close[i + 8]) && (High[i] < High[i + 5]) && (High[i] < High[i + 6]))
num_zero1 = 0;
else
num_zero1 = 1;

if ((Low[i + 2] > Close[i + 7]) && (Low[i + 2] > Close[i + 8]) && (Low[i] > Low[i + 5]) && (Low[i] > Low[i + 6]))
num_zero2 = 0;
else
num_zero2 = 1;

return (num_zero1 * num_zero2 * (diff1 + diff2));
}

//+------------------------------------------------------------------+
//| Calculate the Absolute Value |
//+------------------------------------------------------------------+
double AbsDailyValue(int i = 0)
{
double diff1 = MathAbs(High[i] - High[i + 2]);
double diff2 = MathAbs(Low[i] - Low[i + 2]);

return (diff1 + diff2);
}
//+------------------------------------------------------------------+
142 changes: 142 additions & 0 deletions RangeExpansionIndex.mq5
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//+------------------------------------------------------------------+
//| RangeExpansionIndex.mq5 |
//| Copyright © 2010-2022, EarnForex.com |
//| https://www.earnforex.com/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2010-2022, EarnForex.com"
#property link "https://www.earnforex.com/metatrader-indicators/Range-Expansion-Index/"
#property version "1.01"

#property description "Calculates Tom DeMark's Range Expansion Index."
#property description "Going above 60 and then dropping below 60 signals price weakness."
#property description "Going below -60 and the rising above -60 signals price strength."
#property description "For more info see The New Science of Technical Analysis."

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_plots 1
#property indicator_color1 clrBlue
#property indicator_type1 DRAW_LINE
#property indicator_level1 60
#property indicator_level2 -60

enum enum_candle_to_check
{
Current,
Previous
};

input int REI_Period = 8; // REI Period
input bool EnableNativeAlerts = false;
input bool EnableEmailAlerts = false;
input bool EnablePushAlerts = false;
input enum_candle_to_check TriggerCandle = Previous;

// Buffers:
double REI[];

// Global variables:
datetime LastAlertTime = D'01.01.1970';

void OnInit()
{
IndicatorSetString(INDICATOR_SHORTNAME, "REI(" + IntegerToString(REI_Period) + ")");
IndicatorSetInteger(INDICATOR_DIGITS, 2);
SetIndexBuffer(0, REI, INDICATOR_DATA);
PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, REI_Period + 8);
}

int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &Time[],
const double &open[],
const double &High[],
const double &Low[],
const double &Close[],
const long &tick_volume[],
const long &volume[],
const int &spread[])
{
int limit;

// Too few bars to do anything.
if (rates_total <= REI_Period + 8) return 0;
// If we don't have enough bars to count as specified in the input.
int counted_bars = prev_calculated;
if (counted_bars < 8 + REI_Period) limit = 8 + REI_Period;
else limit = rates_total - 1;

for (int i = rates_total - 1; i >= limit; i--)
{
double SubValueSum = 0;
double AbsDailyValueSum = 0;
for (int j = 0; j < REI_Period; j++)
{
SubValueSum += SubValue(i - j, High, Low, Close);
AbsDailyValueSum += AbsDailyValue(i - j, High, Low, Close);
}
if (AbsDailyValueSum != 0) REI[i] = SubValueSum / AbsDailyValueSum * 100;
else REI[i] = 0;
}

// Alerts
if (((TriggerCandle > 0) && (Time[rates_total - 1] > LastAlertTime)) || (TriggerCandle == 0))
{
string Text;
// Level 60
if ((REI[rates_total - 1 - TriggerCandle] < 60) && (REI[rates_total - 2 - TriggerCandle] >= 60))
{
Text = "REI: " + Symbol() + " - " + StringSubstr(EnumToString((ENUM_TIMEFRAMES)Period()), 7) + " - Crossed 60 from above.";
if (EnableNativeAlerts) Alert(Text);
if (EnableEmailAlerts) SendMail("REI Alert", Text);
if (EnablePushAlerts) SendNotification(Text);
LastAlertTime = Time[rates_total - 1];
}
// Level -60
if ((REI[rates_total - 1 - TriggerCandle] > -60) && (REI[rates_total - 2 - TriggerCandle] <= -60))
{
Text = "REI: " + Symbol() + " - " + StringSubstr(EnumToString((ENUM_TIMEFRAMES)Period()), 7) + " - Crossed -60 from below.";
if (EnableNativeAlerts) Alert(Text);
if (EnableEmailAlerts) SendMail("REI Alert", Text);
if (EnablePushAlerts) SendNotification(Text);
LastAlertTime = Time[rates_total - 1];
}
}

return rates_total;
}

//+------------------------------------------------------------------+
//| Calculate the Conditional Value |
//+------------------------------------------------------------------+
double SubValue(const int i, const double &High[], const double &Low[], const double &Close[])
{
int num_zero1, num_zero2;

double diff1 = High[i] - High[i - 2];
double diff2 = Low[i] - Low[i - 2];

if ((High[i - 2] < Close[i - 7]) && (High[i - 2] < Close[i - 8]) && (High[i] < High[i - 5]) && (High[i] < High[i - 6]))
num_zero1 = 0;
else
num_zero1 = 1;

if ((Low[i - 2] > Close[i - 7]) && (Low[i - 2] > Close[i - 8]) && (Low[i] > Low[i - 5]) && (Low[i] > Low[i - 6]))
num_zero2 = 0;
else
num_zero2 = 1;

return (num_zero1 * num_zero2 * (diff1 + diff2));
}

//+------------------------------------------------------------------+
//| Calculate the Absolute Value |
//+------------------------------------------------------------------+
double AbsDailyValue(const int i, const double &High[], const double &Low[], const double &Close[])
{
double diff1 = MathAbs(High[i] - High[i - 2]);
double diff2 = MathAbs(Low[i] - Low[i - 2]);

return (diff1 + diff2);
}
//+------------------------------------------------------------------+

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