Google Trends is a great resource for determining crowd sentiment. See in this 30 minute video 3 primary ways to search sentiment and how it relates to future price action. Large macro trades with past data presented. Great for anyone looking to catch the next big move in capital markets.
Double Tops can lead to big market declines and major opportunities for traders. But what distinguishes double tops from general price action? See this 45 minute video for concrete trading examples of major double tops, with additional indicators you can apply to help confirm the price action.