Popular tags: Support, Resistance, Trend, Range, Fibonacci, Wave, Divergence, Multi time frames(MTF), Swing, Volume, Overbought, Oversold
Customization and Conversion for: MetaTrader(MT4, MT5), Thinkorswim, NinjaTrader, MultiCharts, Tradingview, Prorealtime, SierraChart, etc.
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Bullish Flag chart pattern indicator with alert, SCAN for Thinkorswim TOS

Bullish Flag chart pattern indicator with alert, SCAN for Thinkorswim TOS
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This indicator will automatically detect Bullish Flag chart pattern.

It will plot two trend lines of the Bullish Flag on the chart when the pattern is formed.

  • The resistance (upper) line is formed by 2 or more descending peaks.

  • The support (lower) line is formed by 2 or more descending troughs.

  • It can be considered as the boundary of incoming Highs and Lows until a breakout occurs.

It works on all timeframes. Alerts will be triggered when price cross above the upper trend line or cross below the lower trend line. There will be a wedge drawn above/below the current bar whenever a crossover occurs.

The pattern detection is based on four swing points, two swing highs and two swing lows.

You can control the size of pattern you want to detect by changing the value of Input Strength: the number of bars on the left and right side of the swing high and low.

The upper trend line is formed by point A and B, the lower trend line is formed by point C and D. Please check the chart below.

In order to be more efficient, this indicator will only show the most recent Broadening Formation pattern on the chart.


If we set Strength to 5, it means the high at A is higher than the highs of on both of its left and right side for 5 bars, same for point B. And the price low at C is lower than 5 bars on both left and right side, same for point D. 

The larger value you set for "Strength" the bigger size of the pattern you will get.

You can also change the color of the trend lines and the color to highlight the pattern.


Please make sure you use the same "strength" input on both scan and indicator, otherwise, you may not get the plot on the chart. For example, you have "strength"=10 in scan and "strength"=5 on chart indicator, when you load the scan result symbols on the chart, there maybe no pattern shows up.


There are 5 scans. If there is no scan result, please try with different input.

# scan type=1; for price cross above upper line
# scantype=2; for price cross below lower line
# scantype=3; for price is below lower line
# scantype=4; for price is above upper line
# scantype=5; for price is inside two lines.

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