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How to Use Charts


The trend is your friend

Technical analysts dispute many finer points of their craft but are agreed on the premise that the share price moves in trends. The usual advice to investors is to go with the flow. An uptrend in the share price shows that demand is greater than supply, and you should buy the shares for as long as it lasts. Conversely, if the trend is down, you should sell the shares or go short on them, again until the trend reverses.

The longer a trend lasts, the more reliable it is likely to be, technical analysts are agreed. Trends remain in force until they are broken, when a charting software package may be programmed to trigger an alarm.

A trend may be in many time frames simultaneously and the short-term trend is more likely to continue if it is moving in the direction of the longer-term one, technical analysts say.
Victor Niederhoffer, a US trader and author, has challenged whether the trend exists. In so doing, he has attacked the concept of technical analysis at root.

Support and resistance
The resistance level is the high point on a chart where the stock price has stopped rising, because investors will not buy further and sellers have emerged. At the other extreme, the support level is where investors have stopped selling.

The more a support or resistance line is tested, the more effective it is considered. Support and resistance often arise at round numbers which, in the case of stocks, are often 90p, 100p or 200p.

Trader David Jones explains to packed seminars in London how he uses support and resistance to help time his own trades. ‘If a share price rises above the resistance line, you buy, and if it goes below the support line, you sell.

The boundaries are self-renewing and, once the share price has fallen below the support level, it becomes the new resistance line. It makes sense because some of the shareholders who failed to sell before the share price fell below the old support line will seize the opportunity if the price should subsequently return there. It works both ways and the resistance level after the share price has risen above it becomes the new support level.

Trend channels
Once a trend has three tops or bottoms in succession, a trend line may be drawn against them, and it confirms the trend. A trend channel is the space between a trend line touching the highest points, indicating resistance, and a parallel line touching the lowest points, indicating support.

In the case of a volatile stock, the trend channel will be large enough to trade profitably on price fluctuations within it. It brings a whole new meaning to the term cross-channel shopping. Some traders divide the trend channel along the middle with a horizontal line and, when the share price is above it, they sell the shares, and when it is below, they buy them.


Chart patterns
Many are sceptical about reading meanings into patterns in the charts. The pattern is the most famous manifestation of technical analysis. It appears on any type of chart but is clearest on the line chart. Any pattern is constructed from the price fluctuation on the chart representing the struggle between buyers and sellers. The pattern repeats itself in different markets and on different stocks.

Every pattern shows how the dynamics of supply and demand play out, and technicians believe that it has some predictability. Some use the patterns to time trades and predict future price movements, and others are cynical, even sometimes from within the ranks of technicians.

When one side gets the upper hand, the line breaks out of the pattern. On an upside movement, trading volume tends to rise. As a rule of thumb, the move is confirmed only when it has exceeded 3 per cent of the share price, and there are many false breakouts.

If a breakout happens, there is a neat, if not wholly reliable, rule on how long it should last. Measure the full depth of the preceding pattern and project it as a minimum from the point of breakout. This is your target length. Make allowances for a likely temporary retracement, which may revert to the original pattern.

There are continuation and reversal patterns. Continuation is when the share price continues in the same direction as before the pattern started, confirming the trend. Reversal is when a trend is changing. Unfortunately, patterns do not always work out as planned and it is not always clear whether they represent continuation or reversal.

In the examples below, I have put some key patterns in the more appropriate of the two categories, making it clear where they may have a foot in either camp. Candlestick patterns are beyond the scope of this short book, but you will find plenty of these in my book How to Win as a Stock Market Speculator, also published by Kogan Page.

Continuation patterns
Here are some common forms.
Flag
The flag forms in a strong trend, whether up or down, typically in less than three weeks, and technicians consider it a reliable continuation pattern. It takes the shape of a flag-like consolidation in the share price with a small price range, formed on declining volume, which is followed by a significant move. The pattern on the chart looks like a flag and its flagpole.

In an uptrend, the flag will slope downwards and, in a downtrend, upwards.

Gap
The gap takes the form of a physical break in share price movement and is often, but not always, a continuation pattern. The less frequently the gap arises, the more significant it is, particularly on a heavily traded stock. If trading volume rises with the gap, it also strengthens the message.

Technicians have identified four types of gap: common, breakaway, runaway and exhaustion.

They will usually ignore the common gap, which arises when trading is congested within a range due to lack of interest, a frequent situation with less liquid stocks.

The breakaway gap arises when the price breaks out of a range following a price reversal, and it suggests a new trend.

The runaway gap is rarer and signals that the trend will be continued. It is also known as the continuation or measuring gap.

The exhaustion gap arises when a fast move in the share price has almost reached an end. It indicates that the trend is weakening and may be a continuation or a reversal pattern.

Pennant
The pennant consists of some straight lines drawn through highs and others through lows that converge to complete a small symmetrical triangle (see under Triangle below). The pattern is formed on declining volume after the share price has moved up or down quickly, and usually within three weeks.

Rectangle
The rectangle is shaped as it sounds. It is a pricing range where the price swings up to a resistance line, then down to a support line until breakout. There is no rule on how many times price movements must touch the upper boundary.

The rectangle is most often a continuation pattern. This type of rectangle forms quickly, has a small price range, and is seen as more significant if it is nestling within a larger one. The rectangle can be a reversal pattern, in which case it forms more slowly and with a broader price range.

Triangle
The triangle consists of two lines that converge at an apex. One line represents resistance and the other support. The more often the share price touches these lines, the more reliable the pattern.

The most reliable breakouts from a triangle are believed to arise between 50 and 75 per cent towards the apex. Much earlier, the breakout is often false, meaning that the pattern is likely to continue. A symmetrical triangle has a top line that slants down and a bottom line that slants up. It may arise in an uptrend or a downtrend. If the price breaks out in the same direction as the previous trend, as is most usual, it is likely to be a continuation. If it breaks out in the opposite direction, it is likely to be a reversal.

The ascending triangle has equal highs but higher lows. In an uptrend, it is often a continuation pattern, and, in a downtrend, it is often a reversal. The descending triangle follows the same principle in reverse.


Wedge
The wedge has boundary lines that slope up or down together into an apex. If it is slanted against the trend, it indicates likely continuation. If it follows the trend, it suggests reversal. The pattern is usually completed within three months.


Reversal patterns
Here are some common forms.

Broadening formation
The broadening formation, known as the megaphone, is a rare bearish pattern. It arises when at least three successive peaks have each risen, accompanied by rising volume, and at least two successive troughs have fallen, accompanied by contracting volume.

The tops should be joined in one line and the bottoms in another. The two lines diverge.

Double top or bottom
The double top is a similarly rare bearish pattern and it develops usually over some months. The share price rises, falls back, then returns to its old peak, or close to it, and reverts.

The double bottom is the same in reverse, and is a bullish pattern. Some technicians consider it reliable only if trading volume rises as the second bottom is formed.

Head and shoulders
The head and shoulders is the best-known reversal pattern and is a bearish signal. The share price moves up and reverts to form the first shoulder, which is a peak in the trend. A sharp reaction will follow, and the share price dips to form a trough. It will then rise to a higher peak, which becomes the head, and will drop back again to form a second trough. The share price will rise once more, but can only form another shoulder before falling down and breaking the support level, which is known as the neckline.

The reverse head and shoulders is a bullish reversal signal anticipating the end of a bear market.

Saucer top or bottom
The saucer top is a rounded version of the head and shoulders or double top. It is a bearish signal that occurs in tired bull markets. It shows the share price rise, turn slowly and reverse into decline, tracing a circular motion on the chart.





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