# CDD Spike Detection

## 📊 What is a CDD Spike?

### 🔍 What is CDD?

**CDD (Coin Days Destroyed)** is a blockchain metric that shows when long-held coins move.

* The longer a coin stays unmoved, the more weight it has in CDD.
* If a wallet that hasn't moved funds in a long time suddenly transfers coins, the CDD value jumps.

In short: **big old wallets waking up = high CDD**.

***

### 🚨 What is a CDD Spike?

A **CDD spike** means an unusually large number of dormant coins moved in a short time. These spikes often hint that:

* Long-term holders are reacting to something
* Big players might be taking action before a market shift

But how do we tell the difference between normal movement and a spike?

***

### 📐 How Do We Detect a Spike?

To avoid false signals, we only mark a spike if it’s far above the normal level.

We calculate:

```
CDD value > average + 2 × standard deviation
```

This means:

* We find the average of recent CDD values
* We calculate how much values typically vary (standard deviation)
* If a new CDD value is **way higher than normal**, it’s marked as a **spike**

This method highlights **rare, strong moves** — not noise.

***

### 🧮 What is Standard Deviation (In Simple Terms)?

It tells us how “spread out” the numbers are.

* If most CDD values are close to the average, std is small
* If values swing wildly, std is big

We mark a spike when the value is **more than 2× std** above the average. Why 2? Because it usually means **95% of values are below it**.

So if something goes above that, it’s special.

***

### 📈 How to Read the Graph and Use It

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The CDD Spike Heatmap shows:

* 🟠 Orange bars = CDD value at that time
* ⭐ Black stars = when a spike is detected
* 📈 Green line = BTC price from Binance
* 💬 Text labels = how BTC moved 6 hours after the spike

#### What You Should Watch:

* Look for a **black star** above a high orange bar
* Check the label → did price go up or down afterward?
* Was this behavior repeated in other spikes?

This gives you an edge:

> If 4 of the last 5 spikes were followed by a BTC drop, the next spike may signal a smart-exit moment.

You don't need to guess — the data shows it.

***

### 🧠 Why Should You Care?

Because these spikes can act as **early signals**. After a spike, we watch:

* What BTC price does in the next few hours
* Does the market react?

If it often does, we have a powerful warning tool.

***

### 🧭 Summary for Users

* ✅ **CDD spike** = long-dormant wallets moving suddenly
* ✅ We detect spikes using smart math (mean + 2×std)
* ✅ Only rare, meaningful events are shown
* ✅ Useful to spot shifts before they show up in price
* ✅ Follow the chart: spike → check reaction → spot patterns

You don’t need to know the math — just follow the signals. When you see a spike, stay alert.

This is like watching the big players whisper — before they shout.