How to Master a Retail Trend

I'm a big advocate of buying strength in markets and selling weakness in markets. So I would wait to see markets that will show strength or markets that will showing weakness. What's your preferred broker and trading platform? I like CQJ, commodity core graphics. But for the most part, what I would do is anything that has price and value that's accurate. If there's one thing you'd recommend any retail trend spend the next month mastering,. Why? And how could they go about mastering it?