This Element is an excerpt from The ETF Trend Following Playbook: Profiting from Trends in Bull or Bear Markets with Exchange Traded Funds (ISBN: 9780137029013) by Tom Lydon. Available in print and digital formats. Use moving averages to predict market trends-and transform your predictions into profits! Buy low, sell high. Sounds easy, doesn't it? But if you've tried it, you know how hard it is. Wouldn't it be great if you could see when a trend might be coming or going? If an uptrend developed, you'd have the green light. If a trend turned negative, you could avoid losses by selling early. Good news! It's possible.