How to Make a Prediction From a Stock Chart

Use indicators. In addition to the price of a stock over a given time period, most charts include data on volume and price moving averages as well as various meta-indicators that help interpret this data. The Relative Strength Indicator and Moving Average Convergence/Divergence oscillator are common indicators that most chartists use to confirm the strength of a trend.
Identify support and resistance. Some of the most useful information to a trader or investor is support and resistance levels. These are the price at which a stock has tendencies to be widely bought and sold. Often, price will react predictably at these levels, consistent with past performance. If these levels are broken by prices moving beyond them, however, they are still useful as confirmation of a major change in behavior.
Look for trend lines. Trends are what most investors and traders want to spot. By connecting tops or bottoms, chartists can draw a trend line and evaluate whether it's used as support or resistance in continuation of the trend.
Count wave patterns. Elliott wave counting is a complex and highly specialized chart-reading technique that can make powerful predictions about a stock based on the relative size and duration of price movements.
Read candlesticks. One of the oldest chart-reading techniques is the interpretation of candlesticks. Most have Japanese names because the technique was invented by rice traders in Japan. The relative shape and size of a candlestick's body and wick and its shape in relation to the candlesticks adjacent to it are widely believed to have predictive value.

How to Read Stock Charts for Beginners (5 Steps)

Locate the stock symbol at the top of stock chart. The chart will also contain information about the stock's highs and lows (depicted by vertical bars), the volume traded (shown by a bar graph at the bottom of the chart), and the closing price in plain English.
Find the trend direction by looking at a 20-day and 50-day moving average (MA). Moving averages are generally located below the stock symbol on a chart. For example, an MA might be (20) 45.30. That means the moving 20-day average is 45.30 for the last 20 days. A general rule of thumb is that if the 20-day MA is above the 50-day, then the stock is trending up; if the 20-day MA is below the 50-day, the stock is trending down. You can also spot an upward trend by noticing a graph tending toward the top right corner of the graph; a downward trending stock will start creeping toward the bottom right.
Identify the price support. A price support is a low point in trading that the stock never falls below. On a graph, the stock might go up and down haphazardly; you want to find the point on the graph that's the lowest.
Identify the price resistance. In general, price resistance is the point on the graph where the price 'tops out.' In other words, the maximum value on the graph. Price resistance is the opposite of price support.
Repeat the above steps for as many stocks as possible over a few weeks. You'll begin to notice trends, and will be more able to identify price support and resistance over a period of time. You'll also be able to see when the price resistance breaks through; when this happens, it can make for a flurry of trading, as it usually means something exciting has been announced in that particular company.