OPEN-SOURCE SCRIPT
Double Top Patterns [theEccentricTrader]
█ OVERVIEW
This indicator automatically draws double top patterns and price projections derived from the ranges that constitute the patterns.
█ CONCEPTS
Green and Red Candles
• A green candle is one that closes with a close price equal to or above the price it opened.
• A red candle is one that closes with a close price that is lower than the price it opened.
Swing Highs and Swing Lows
• A swing high is a green candle or series of consecutive green candles followed by a single red candle to complete the swing and form the peak.
• A swing low is a red candle or series of consecutive red candles followed by a single green candle to complete the swing and form the trough.
Peak and Trough Prices (Basic)
• The peak price of a complete swing high is the high price of either the red candle that completes the swing high or the high price of the preceding green candle, depending on which is higher.
• The trough price of a complete swing low is the low price of either the green candle that completes the swing low or the low price of the preceding red candle, depending on which is lower.
Historic Peaks and Troughs
The current, or most recent, peak and trough occurrences are referred to as occurrence zero. Previous peak and trough occurrences are referred to as historic and ordered numerically from right to left, with the most recent historic peak and trough occurrences being occurrence one.
Broken and Unbroken Peaks and Troughs
Upon the completion of a new swing low the high of the green candle that completes the swing low will be above, below or equal to the current peak price. And similarly, upon the completion of a new swing high the low of the red candle that completes the swing high will be above, below or equal to the current trough price.
If the high price of the green candle that completes the current swing low is higher than or equal to the current peak price then the current peak is broken. If the high of the green candle that completes the current swing low is below the current peak price, then the current peak is unbroken.
Similarly, if the low price of the red candle that completes the current swing high is lower than or equal to the current trough price then the current trough is broken. If the low price of the red candle that completes the current swing high is above the current trough price, then the current trough is unbroken.
Range
The range is simply the difference between the current peak and current trough prices, generally expressed in terms of points or pips.
Retracement and Extension Ratios
Retracement and extension ratios are calculated by dividing the current range by the preceding range and multiplying the answer by 100. Retracement ratios are those that are equal to or below 100% of the preceding range and extension ratios are those that are above 100% of the preceding range.
Double Bottom and Double Top Patterns
• Double bottom patterns are composed of one peak and two troughs, with the second trough being roughly equal to the first trough.
• Double top patterns are composed of one trough and two peaks, with the second peak being roughly equal to the first peak.
Measurement Tolerances
In general, tolerance in measurements refers to the allowable variation or deviation from a specific value or dimension. It is the range within which a particular measurement is considered to be acceptable or accurate. In this script I have applied this concept to the measurement of double bottom and double top patterns to increase to the frequency of pattern occurrences.
For example, a perfect double bottom is very rare. We can increase the frequency of pattern occurrences by setting a tolerance. A ratio tolerance of 10% to both downside and upside, which is the default setting, means we would have a tolerable ratio measurement range between 90-110% for the second trough, thus increasing the frequency of occurrence.
█ FEATURES
Inputs
• Unbroken Troughs
• Lower Tolerance
• Upper Tolerance
• Pattern Color
• Neckline Color
• Extend Current Neckline
• Show Labels
• Label Color
• Show Projection Lines
• Extend Current Projection Lines
Alerts
Users can set alerts for when the patterns occur.
█ LIMITATIONS
All green and red candle calculations are based on differences between open and close prices, as such I have made no attempt to account for green candles that gap lower and close below the close price of the preceding candle, or red candles that gap higher and close above the close price of the preceding candle. This may cause some unexpected behaviour on some markets and timeframes. I can only recommend using 24-hour markets, if and where possible, as there are far fewer gaps and, generally, more data to work with.
This indicator automatically draws double top patterns and price projections derived from the ranges that constitute the patterns.
█ CONCEPTS
Green and Red Candles
• A green candle is one that closes with a close price equal to or above the price it opened.
• A red candle is one that closes with a close price that is lower than the price it opened.
Swing Highs and Swing Lows
• A swing high is a green candle or series of consecutive green candles followed by a single red candle to complete the swing and form the peak.
• A swing low is a red candle or series of consecutive red candles followed by a single green candle to complete the swing and form the trough.
Peak and Trough Prices (Basic)
• The peak price of a complete swing high is the high price of either the red candle that completes the swing high or the high price of the preceding green candle, depending on which is higher.
• The trough price of a complete swing low is the low price of either the green candle that completes the swing low or the low price of the preceding red candle, depending on which is lower.
Historic Peaks and Troughs
The current, or most recent, peak and trough occurrences are referred to as occurrence zero. Previous peak and trough occurrences are referred to as historic and ordered numerically from right to left, with the most recent historic peak and trough occurrences being occurrence one.
Broken and Unbroken Peaks and Troughs
Upon the completion of a new swing low the high of the green candle that completes the swing low will be above, below or equal to the current peak price. And similarly, upon the completion of a new swing high the low of the red candle that completes the swing high will be above, below or equal to the current trough price.
If the high price of the green candle that completes the current swing low is higher than or equal to the current peak price then the current peak is broken. If the high of the green candle that completes the current swing low is below the current peak price, then the current peak is unbroken.
Similarly, if the low price of the red candle that completes the current swing high is lower than or equal to the current trough price then the current trough is broken. If the low price of the red candle that completes the current swing high is above the current trough price, then the current trough is unbroken.
Range
The range is simply the difference between the current peak and current trough prices, generally expressed in terms of points or pips.
Retracement and Extension Ratios
Retracement and extension ratios are calculated by dividing the current range by the preceding range and multiplying the answer by 100. Retracement ratios are those that are equal to or below 100% of the preceding range and extension ratios are those that are above 100% of the preceding range.
Double Bottom and Double Top Patterns
• Double bottom patterns are composed of one peak and two troughs, with the second trough being roughly equal to the first trough.
• Double top patterns are composed of one trough and two peaks, with the second peak being roughly equal to the first peak.
Measurement Tolerances
In general, tolerance in measurements refers to the allowable variation or deviation from a specific value or dimension. It is the range within which a particular measurement is considered to be acceptable or accurate. In this script I have applied this concept to the measurement of double bottom and double top patterns to increase to the frequency of pattern occurrences.
For example, a perfect double bottom is very rare. We can increase the frequency of pattern occurrences by setting a tolerance. A ratio tolerance of 10% to both downside and upside, which is the default setting, means we would have a tolerable ratio measurement range between 90-110% for the second trough, thus increasing the frequency of occurrence.
█ FEATURES
Inputs
• Unbroken Troughs
• Lower Tolerance
• Upper Tolerance
• Pattern Color
• Neckline Color
• Extend Current Neckline
• Show Labels
• Label Color
• Show Projection Lines
• Extend Current Projection Lines
Alerts
Users can set alerts for when the patterns occur.
█ LIMITATIONS
All green and red candle calculations are based on differences between open and close prices, as such I have made no attempt to account for green candles that gap lower and close below the close price of the preceding candle, or red candles that gap higher and close above the close price of the preceding candle. This may cause some unexpected behaviour on some markets and timeframes. I can only recommend using 24-hour markets, if and where possible, as there are far fewer gaps and, generally, more data to work with.
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