Whether I am trading stocks, options, or futures, I use trendlines to identify potential trades. However, all trendlines are not equally valuable in identifying potential trades. I look for three reasons to trust a trendline. First, the more touches of a price against a trendline, the more significant. Second, the more horizontal the trendline, the more reliable. Third, the trendline needs to be over the stock’s ATR trailing stop. Specifically, the price of the product I am trading must be one timeframe higher or under the ATR trailing stock in the direction of the trendline.