Price Charts: Construction and Interpretation
This lesson describes the construction of a candlestick chart, the effect of timeframe selection on interpretation, and the limitations of chart analysis conducted with hindsight.
Risk note: educational content only. This article is not financial advice, investment advice, or a recommendation to buy or sell any instrument. Trading leveraged products can result in losses greater than expected, and each reader should understand the risks before trading.
A price chart is a compressed record of completed transactions. It is an indispensable analytical tool, and it is also capable of misleading the observer, because the human eye identifies patterns in random data as readily as in meaningful data. This lesson explains the information contained in a single candlestick, describes how the choice of timeframe alters the picture presented by the same market, sets out the sequence in which timeframes should be consulted, and identifies the principal way in which chart analysis conducted after the fact overstates the clarity of the signals available at the time.
The construction of a candlestick
Each candlestick summarises price activity over a fixed period, which on the MetaTrader 5 platform ranges from one minute to one month. It records four values: the opening price, the highest price traded, the lowest price traded and the closing price. The body of the candle spans the opening and closing prices, and its colour indicates whether the close was above or below the open. The wicks, or shadows, extend from the body to the high and the low.
The relationship between the body and the wicks conveys information about the balance of buying and selling pressure during the period. A long upper wick indicates that the price was driven higher during the period and subsequently retreated, which suggests that higher prices were rejected. A long lower wick indicates the reverse. This is the full extent of the information a single candle contains; any further conclusion drawn from it is an inference that requires confirmation from the surrounding price action.
The effect of timeframe selection
The same market may present as a sustained uptrend on a daily chart and as a sharp decline on a five-minute chart at the same moment. Neither presentation is incorrect. The two charts answer different questions: the daily chart describes the direction of the market over weeks, while the five-minute chart describes fluctuation within a single session. The trader must be clear which question a given chart is answering before acting on it.
New participants tend to select timeframes that are too short. On short timeframes the proportion of random fluctuation to directional movement is highest, and transaction costs represent a larger share of the typical price movement. Most of the concepts introduced in this course are more readily observed on the four-hour and daily charts, and it is recommended that analysis begins on these timeframes. The MetaTrader 5 platform is available on desktop, web, iOS and Android, and the same timeframes are available on each.
The sequence of timeframe analysis
A disciplined method of chart analysis proceeds from the higher timeframe to the lower. The higher timeframe is consulted first to establish the prevailing direction and the significant price levels; the lower timeframe is then consulted to identify the precise point of entry within that context. The reverse sequence, in which an entry is identified on a short timeframe and the higher timeframe is consulted afterwards, if at all, produces positions taken against the prevailing direction.
A well-formed entry signal on a five-minute chart that opposes a strong daily trend has a low probability of success, since the order flow driving the higher timeframe is likely to overwhelm the short-term pattern. A three-tier framework, in which each timeframe is assigned a distinct role, provides a practical structure for this analysis.
- Higher timeframe: prevailing direction and significant levels.
- Intermediate timeframe: identification of the trading setup.
- Lower timeframe: timing of the entry only.
The limitation of hindsight
When a chart is reviewed after the fact, every significant turning point appears obvious. Scrolling back through any price history reveals numerous apparently ideal entries, none of which was evident at the right-hand edge of the chart at the time, where every trading decision must actually be made. This effect, known as hindsight bias, causes the observer to overestimate the reliability of chart patterns and the ease of identifying them in real time.
A useful corrective exercise is to conceal the right-hand portion of a historical chart and to advance it one candle at a time, recording a decision at each step before the next candle is revealed. The exercise demonstrates the difference between recognising a pattern in a completed history and identifying it as it forms. It is instructive and is recommended before any chart-based method is applied on the demo account.