Add example of indicator usage to indicators module README

README.md

@@ -13,4 +13,39 @@ pandas
 
 There is also a dependency on the [OHLC module](https://moshferatu.dev/moshferatu/ohlc) for running tests.
 
+## Example Usage
+
+The following is an example of using the provided [RSI indicator](https://moshferatu.dev/moshferatu/indicators/src/branch/main/indicators/rsi.py):
+
+```python
+from datetime import datetime, timedelta
+
+from indicators import rsi
+from ohlc import ohlc
+
+today = datetime.today()
+data = ohlc('SPY', start_date = today - timedelta(days = 365), end_date = today)
+
+rsi_values = rsi(data, period = 14)
+print(rsi_values)
+```
+
+The result will be returned as a ```pandas``` **Series**.
+
+Example:
+
+```
+0       0.000000
+1       0.000000
+2       0.000000
+3      66.017608
+4      75.789601
+         ...
+246    63.393288
+247    66.070866
+248    63.168300
+249    66.415897
+250    67.316906
+```
+
 ---