How to Add a TrendLine in Excel Charts (Step-by-Step Guide)

Period in the trend line. Trendline Definition & Example

Additional Resources Trend Lines As technical analysis is built on the assumption that prices trend, the use of trend lines is important for both trend identification and confirmation.

period in the trend line

A trend line is a straight line that connects two or more price points and then extends into the future to act as a line of support or resistance. Many of the principles applicable to support and resistance levels can be applied to trend lines as well.

Excel Charts - Moving Average

It is important that you understand all of the concepts presented in our Support and Resistance article before continuing on. Definition Uptrend Line An uptrend line has a positive slope and is formed by connecting two or more low points.

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Period in the trend line second low must be higher than the first for the line to have a positive slope. Note that at least three points must be connected before the line is considered to be a valid trend line. Uptrend lines act as support and indicate that net-demand demand less supply is increasing even as the price rises. A rising price combined with increasing demand is very bullish, and shows a strong determination on the part of the buyers.

As long as prices remain above the trend line, the uptrend is considered solid and intact. A break below the uptrend line indicates that net-demand has weakened and a change in trend could be imminent. Downtrend Line A downtrend line has a negative slope and is formed by connecting two or more high points.

The second high must be lower than the first for the line to have a negative slope. Downtrend lines act as resistance, and indicate that net-supply supply less demand is increasing even as the price declines.

Trend line (technical analysis)

A declining price combined with increasing supply is very bearish, and shows the strong resolve of the sellers. As long as prices remain below the downtrend line, the downtrend is solid and intact.

A break above the downtrend line indicates that net-supply is decreasing and that a change of trend could be imminent.

period in the trend line

For a detailed explanation of trend changes, which are different than just trend line breaks, please see our article on the Dow Theory. Scale Settings High points and low points appear to line up better for trend lines when prices are displayed using a semi-log scale. This is especially true when long-term trend lines are being drawn or when there is a large change in price. Most charting programs allow users to set the scale as arithmetic or semi-log.

An arithmetic scale displays incremental values 5,10,15,20,25,30 evenly as they move up the y-axis.

Trend Lines

A semi-log scale displays incremental values in percentage terms as they move up the y-axis. In the case of Amazon. These false breakouts could have led to premature buying as the stock continued to decline after each one.

period in the trend line

The semi-log scale reflects the percentage loss evenly, and the downtrend line was never broken. In the case of EMC, there was a large price change over a long period of time. While there were not any false breaks below the uptrend line on the arithmetic scale, the rate of ascent appears smoother on the semi-log scale. EMC doubled three times in less than two years.

On the semi-log scale, the trend line fits all the way up.

How to Add a TrendLine in Excel Charts (Step-by-Step Guide)

On the arithmetic scale, three different trend lines were required to keep pace with the advance. Validation It takes two or more points to draw a trend line. The more points used to draw the trend line, the more validity attached to the support or resistance level represented by the trend line.

It can sometimes be difficult to find more than 2 points from which to construct a trend line. Even though trend lines are an important aspect of technical analysis, it is not always possible to draw trend lines on every price chart.

period in the trend line

Sometimes the lows or highs just don't match up, and it is best not to force the issue. The general rule in technical analysis is that it takes two points to draw a trend line and the third point confirms the validity. After the third touch in Nov, the trend line was considered a valid line of support. Now that the stock has bounced off of this level a fourth time, the soundness of the support level is enhanced even more.

period in the trend line

As long as the stock remains above the trend line supportthe trend will remain in control of the bulls. A break below would signal that net-supply was increasing and that a change in trend could be imminent. Spacing of Points The lows used to form an uptrend line and the highs used to form a downtrend line should not be too far apart, or too close together.

Incredible Charts: Trendlines

The most suitable distance apart will depend on the timeframe, the degree of price movement, and personal preferences. If the lows highs are too close together, the validity of the reaction low high may be in question.

If the lows are too far apart, the relationship between the two points could be suspect.

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  • Trendline Definition & Example

An ideal trend line is made up of relatively evenly spaced lows or highs. The trend line in the above MSFT example represents well-spaced low points. On the Wal-Mart WMT example, the second high point appears to be too close to the first high point for a valid trend line; however, it would be feasible to draw a trend line beginning at point 2 and extending down to the February reaction high. Angles As the steepness of a trend line increases, the validity of the support or resistance level decreases.

A steep trend line results from a sharp advance or decline over a brief period of time. The angle of a trend line created from such sharp moves is unlikely to offer a meaningful support or resistance level.

Even if the trend line is formed with three seemingly valid points, attempting to play a trend line break or to use the support and resistance level established it will often prove difficult.

The trend line for Yahoo!

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YHOO was touched four times over a 5-month period. The spacing period in the trend line the points appears OK, but the steepness of the trend line is unsustainable, and the price is more likely than not to drop below the trend line. However, trying to time this drop I want to make money but I m not 14 make a play after the trend line is broken is a difficult task.

The amount of data displayed and the size of the chart can also affect the angle of a trend line. When assessing the validity and sustainability of a trend line, keep in mind that short and wide charts are less likely to have steep trend lines than long and narrow charts.

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Internal Trend Lines Sometimes there appears to be the possibility of drawing a trend line, but the exact points do not match up cleanly. The highs or lows might be out of whack, the angle might be too steep or the points might be too close together.

If one or two points could be ignored, then a fitted trend line could be formed. With the volatility present in the market, prices can over-react, producing spikes that distort the highs and lows.

One method for dealing with over-reactions is to draw internal trend lines, which ignore these price period in the trend line to a reasonable degree. These lows were formed with selling climaxes, and represented extreme price movements that protrude beneath the trend line. By drawing the trend line through the lows, the line appears to be at a reasonable angle, and the other lows match up extremely well.

Sometimes, there is a price cluster with a high or low spike sticking out. A price cluster is an area where prices are grouped within a tight range over a period of time. The price cluster can be used to draw the trend line, and the spike can be ignored.

Trendline.Period property (Excel)

The Coca Cola KO chart shows an internal trend line that is formed by ignoring price spikes and using the price clusters, instead. In October and NovemberCoke formed a peak, with the November peak just higher than the October peak red arrow. If the November peak had been used to draw a trend line, then the slope would have been more negative, and there would have appeared to be a breakout in Dec gray line.