No single indicator can punch a ticket to market riches, but here are four that remain popular among trend traders.Moving averages smooth data by creating a single flowing line that represents a security’s average price over a period of time, such as 200 days. If the line moves horizontally, the price isn’t trending, it’s ranging. If it’s angled up, an uptrend is underway. A buy signal occurs when a 50-day moving average crosses above the 200-day. A sell signal occurs when the 50-day drops below the 200-day. The moving average convergence divergence is an oscillating indicator that follows trends and indicates momentum. When the MACD lines are above zero, the trend is likely up; below zero means the trend is likely down. Buy signals occur when the MACD moves above zero, and when it crosses below zero it’s a sell signal. The relative strength index is another oscillator. When the RSI is above 70, it often means the price is overbought and due for a correction. Below 30 indicates the price is oversold and due for a bounce. In a strong uptrend, the price can remain at 70 and beyond for sustained periods, and downtrends can stay at 30 and below for a long time. And on balance volume (OBV) takes volume information and compiles it into a one-line indicator. It measures buying and selling pressure by adding the volume on up days and subtracting volume on losing days. Ideally, volume should confirm trends. For example, a rising OBV should go with a rising price.