Update README.md and add link to professional trader course

README.md

@@ -12,11 +12,11 @@ Currently the subscription service supports:
 - GBPJPY
 - XAUUSD
 
-Link to RTB Trading Signal subscription: https://kelvinausoftware.com/rtb-trading-signal/
+Link to RTB Trading Signal subscription: [https://kelvinausoftware.com/rtb-trading-signal/](https://kelvinausoftware.com/rtb-trading-signal/)
 
-Link to RTB details and backtesting report: https://kelvinausoftware.com/realistic-trading-bot-rbt/
+Link to RTB details and backtesting report: [https://kelvinausoftware.com/realistic-trading-bot-rbt/](https://kelvinausoftware.com/realistic-trading-bot-rbt/)
 
-Link to RTB product: https://kelvinausoftware.com/products/
+Link to Professional Trader Course: [https://kelvinausoftware.com/professional-trader-course/](https://kelvinausoftware.com/professional-trader-course/) (Beginnger-friendly and no experienced required. I will also expain RTB algorithm in this course.)
 
 _+2056% backtest return on EURUSD in 2022_
 ![image](https://kelvinau.github.io/crypto-arbitrage/reference/rtb_aggressive_model.gif?1)