Accelerator_v2
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The Accelerator/Decelerator Oscillator is a technical analysis tool designed to help traders understand the underlying momentum and "health" of a market trend. Rather than just looking at price movements, this script analyzes the relationship between different types of moving averages to determine if a trend is gaining strength or losing steam.
How the Logic Works
The script operates through a multi-layered calculation process:
1. Baseline Momentum Calculation First, the tool calculates two distinct moving averages based on the midpoint of the price. By subtracting one average (a shorter period) from another (a longer period), it creates a "momentum" value. This helps identify whether the price is moving faster than its historical average.
2. Signal Smoothing The script then takes that momentum value and applies a secondary smoothing layer. This acts as a "signal line," filtering out minor market noise to reveal the broader trend of the momentum itself.
3. The Accelerator & Decelerator Logic The core intelligence of the script lies in comparing the current state of momentum against its previous values. It calculates the difference between the primary momentum and the signal line:
- Strength Tracking: By comparing these differences across consecutive bars, the tool determines whether the "acceleration" is increasing or decreasing.
- Visual Differentiation: The logic automatically categorizes these movements. It distinguishes between upward-moving energy and downward-moving energy, assigning them to different visual profiles.
What This Means for the Trader
Instead of a cluttered chart, this script simplifies complex data into a clear histogram. It allows you to see:
- Trend Persistence: Whether a current move is being "accelerated" by strong buying/selling pressure or if it is beginning to "decelerate" (lose power).
- Trend Reversals: By observing when the momentum shifts from one state to another, traders can potentially identify points where a trend might be exhausting itself before a price reversal occurs.
In essence, this tool acts as a speedometer for market trends, telling you not just which way the "car" is moving, but how hard it is pressing on the gas pedal or lifting its foot off the brake.
//+------------------------------------------------------------------+
//| Accelerator.mq4 |
//| Copyright © 2005, MetaQuotes Software Corp. |
//| http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net/"
//---- indicator settings
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_color1 Black
#property indicator_color2 Green
#property indicator_color3 Red
//---- indicator buffers
double ExtBuffer0[];
double ExtBuffer1[];
double ExtBuffer2[];
double ExtBuffer3[];
double ExtBuffer4[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- 2 additional buffers are used for counting.
IndicatorBuffers(5);
//---- drawing settings
SetIndexStyle(0,DRAW_NONE);
SetIndexStyle(1,DRAW_HISTOGRAM);
SetIndexStyle(2,DRAW_HISTOGRAM);
IndicatorDigits(Digits+2);
SetIndexDrawBegin(0,38);
SetIndexDrawBegin(1,38);
SetIndexDrawBegin(2,38);
//---- 4 indicator buffers mapping
SetIndexBuffer(0,ExtBuffer0);
SetIndexBuffer(1,ExtBuffer1);
SetIndexBuffer(2,ExtBuffer2);
SetIndexBuffer(3,ExtBuffer3);
SetIndexBuffer(4,ExtBuffer4);
//---- name for DataWindow and indicator subwindow label
IndicatorShortName("AC");
SetIndexLabel(1,NULL);
SetIndexLabel(2,NULL);
//---- initialization done
return(0);
}
//+------------------------------------------------------------------+
//| Accelerator/Decelerator Oscillator |
//+------------------------------------------------------------------+
int start()
{
int limit;
int counted_bars=IndicatorCounted();
double prev,current;
//---- last counted bar will be recounted
if(counted_bars>0) counted_bars--;
limit=Bars-counted_bars;
//---- macd counted in the 1-st additional buffer
for(int i=0; i<limit; i++)
ExtBuffer3[i]=iMA(NULL,0,5,0,MODE_SMA,PRICE_MEDIAN,i)-iMA(NULL,0,34,0,MODE_SMA,PRICE_MEDIAN,i);
//---- signal line counted in the 2-nd additional buffer
for(i=0; i<limit; i++)
ExtBuffer4[i]=iMAOnArray(ExtBuffer3,Bars,5,0,MODE_SMA,i);
//---- dispatch values between 2 buffers
bool up=true;
for(i=limit-1; i>=0; i--)
{
current=ExtBuffer3[i]-ExtBuffer4[i];
prev=ExtBuffer3[i+1]-ExtBuffer4[i+1];
if(current>prev) up=true;
if(current<prev) up=false;
if(!up)
{
ExtBuffer2[i]=current;
ExtBuffer1[i]=0.0;
}
else
{
ExtBuffer1[i]=current;
ExtBuffer2[i]=0.0;
}
ExtBuffer0[i]=current;
}
//---- done
return(0);
}
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