docs: Add imports

README.md

@@ -12,8 +12,28 @@ The main focus of this library is on the accuracy of calculations, but using the
 
 All indicators can be updated over time by streaming data (prices or candles) to the `update` method. Some indicators also provide `static` batch methods for further performance improvements when providing data up-front during a backtest or historical data import.
 
+## Installation
+
+```bash
+npm install trading-signals
+```
+
 ## Usage
 
+**CommonJS:**
+
+```ts
+const {Big, SMA} = require('trading-signals');
+```
+
+**ESM:**
+
+```ts
+import {Big, SMA} from 'trading-signals';
+```
+
+**Example:**
+
 ```typescript
 import {Big, SMA} from 'trading-signals';