OPEN-SOURCE SCRIPT
Engulfing Indicator
This is an "Engulfing" indicator. The "Engulfing" candle pattern is a reversal pattern that can appear at the end of an uptrend or downtrend.
The indicator includes the following inputs or settings:
1. `tolerance`: This defines the percentage difference in size that there must be between the body of the current candle and that of the previous candle to consider that one candle "engulfs" the other.
2. `tailSizePercentage`: This defines the maximum percentage size of the candle's tail in relation to the body of the candle for it to be considered valid.
3. `hideBuy` and `hideSell`: If set to true, they hide the buy and sell labels on the chart.
4. `checkTailSize` and `checkPrevTailSize`: If set to true, they check the size of the tail of the current and previous candle in relation to the body of the candle. If the tail is too large (as defined by `tailSizePercentage`), it is not considered valid.
The indicator works as follows:
First, it calculates the size of the body of the current and previous candle. Then, it checks if the current candle is green (close greater than open) or red (close less than open).
Next, it checks if the current candle "engulfs" the previous one. This means that, in the case of a green candle, the open must be less than or equal to the previous candle's close and the close must be greater than or equal to the previous candle's open. For a red candle, it's the other way around.
The indicator also checks if the size of the previous candle's body is at least a certain percentage (defined by `tolerance`) of the size of the current candle's body.
If `checkTailSize` or `checkPrevTailSize` is enabled, the indicator also checks the size of the tail of the current and/or previous candle. If the tail is too large in relation to the body of the candle (as defined by `tailSizePercentage`), the candle is not considered valid.
Finally, if all conditions are met, a buy or sell signal is generated and a label is drawn on the chart. An alert is also generated.
The indicator includes the following inputs or settings:
1. `tolerance`: This defines the percentage difference in size that there must be between the body of the current candle and that of the previous candle to consider that one candle "engulfs" the other.
2. `tailSizePercentage`: This defines the maximum percentage size of the candle's tail in relation to the body of the candle for it to be considered valid.
3. `hideBuy` and `hideSell`: If set to true, they hide the buy and sell labels on the chart.
4. `checkTailSize` and `checkPrevTailSize`: If set to true, they check the size of the tail of the current and previous candle in relation to the body of the candle. If the tail is too large (as defined by `tailSizePercentage`), it is not considered valid.
The indicator works as follows:
First, it calculates the size of the body of the current and previous candle. Then, it checks if the current candle is green (close greater than open) or red (close less than open).
Next, it checks if the current candle "engulfs" the previous one. This means that, in the case of a green candle, the open must be less than or equal to the previous candle's close and the close must be greater than or equal to the previous candle's open. For a red candle, it's the other way around.
The indicator also checks if the size of the previous candle's body is at least a certain percentage (defined by `tolerance`) of the size of the current candle's body.
If `checkTailSize` or `checkPrevTailSize` is enabled, the indicator also checks the size of the tail of the current and/or previous candle. If the tail is too large in relation to the body of the candle (as defined by `tailSizePercentage`), the candle is not considered valid.
Finally, if all conditions are met, a buy or sell signal is generated and a label is drawn on the chart. An alert is also generated.
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