Automatic Fibonacci Levels for MetaTrader 4

What this version is for

This MetaTrader 4 page is for traders who want the logic in source form rather than a packaged NinjaTrader import. It is best used as a transparent starting point that can be reviewed, compiled, and adjusted inside your own workspace.

That makes this page useful for more than copying code. It also helps you compare how the same trading idea is expressed across platforms, which parts of the workflow are universal, and which parts are specific to MetaTrader 4. If you are moving between platforms or validating whether a concept ports cleanly, source pages like this are often more educational than packaged files alone.

Where it fits

Automatic Fibonacci Levels holds the common retracement prices from the recent high-low swing directly on the chart. It is built for traders who want fast pullback context, not a hand-drawn swing workflow every session.

In the broader library, this source page sits somewhere between a product page and a guide. The main indicator page explains the tool at a higher level, while this page focuses on implementation and adaptation. Traders who already know they want automatic fibonacci levels logic on MetaTrader 4 usually get the most value here because they can move from concept to code without leaving the site.

What to verify first

• Confirm the default inputs make sense for your market and timeframe.
• Compile the script before changing anything else.
• Compare the plotted behavior on a simple chart before adding alerts or automation.
• Treat the script as chart context, not as a promise of trading performance.

That verification step matters because code that compiles is not automatically code that behaves the way you expect. Chart type, bar indexing, session settings, alert behavior, and plotting defaults can all change the reading of an otherwise simple study. Taking a few minutes to validate behavior on a clean chart is almost always cheaper than debugging assumptions after the script is already part of a larger workspace.

Source code

// Automatic Fibonacci Levels
// FreeIndicators.com source example for MetaTrader 4.
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 DodgerBlue
#property indicator_color2 Crimson
#property indicator_color3 SeaGreen

double Buffer1[];
double Buffer2[];
double Buffer3[];

int init() {
   SetIndexBuffer(0, Buffer1);
   SetIndexBuffer(1, Buffer2);
   SetIndexBuffer(2, Buffer3);
   return(0);
}

int start() {
   int counted = IndicatorCounted();
   int limit = Bars - counted - 1;
   int lookback = 80;
   for(int i = limit; i >= 0; i--) {
      int hi = iHighest(NULL, 0, MODE_HIGH, lookback, i);
      int lo = iLowest(NULL, 0, MODE_LOW, lookback, i);
      double range = High[hi] - Low[lo];
      Buffer1[i] = Low[lo] + range * 0.382;
      Buffer2[i] = Low[lo] + range * 0.500;
      Buffer3[i] = Low[lo] + range * 0.618;
   }
   return(0);
}

Settings and tradeoffs

Settings are where a script usually shifts from generic example to something personal and useful. A default input that behaves well on one market may feel too slow, too fast, too wide, or too noisy somewhere else. That does not mean the study is wrong. It usually means the script still needs to be matched to the instrument, the chart type, and the decision style you actually care about.

Limitations

• Levels update as the lookback high or low changes.
• Retracement levels are context, not guarantees.
• A fixed lookback may not match every market condition.

Those limitations are not just caveats for the sake of caution. They are often the exact reasons a study feels helpful on one chart and disappointing on another. A clean source page should tell you where the logic is likely to travel well, where it needs adaptation, and where it should be treated as context rather than as an automated answer. That is especially important when the same concept is being translated from one trading platform to another.

Before you automate anything

Even when a script looks straightforward, it is worth slowing down before attaching alerts, automation, or trade execution logic to it. Indicator code often carries assumptions about confirmed bars, current-bar updates, session handling, or how signals should be interpreted in context. The safest progression is to review the code, compile it, observe it on a chart, compare it to the main product page, and only then decide whether it deserves a larger role in your workflow.

Think of this page as a working reference rather than a promise. It gives you a transparent starting point for MetaTrader 4, a live chart capture tied to the same idea, and a route back to the broader product and guide system if you want more context before making changes.