Reversal pattern indicator

The indicator automatically recognizes classic reversal candlestick patterns and visualizes them on the chart using colored arrows. Works in real time, analyzing the most recent candles.

Engulfing Patterns

Bullish Engulfing:

          Previous candle is bearish, current candle is bullish

          The body of the current candle completely overlaps the body of the previous one

          Open[i] < Close[i-1] and Close[i] > Open[i-1]

Bearish Engulfing:

          Reverse conditions: previous candle is bullish, current candle is bearish

          Complete overlap of the previous candle's body

 Enhanced signal if the current candle's body > 2× the previous candle's body

Hammer / Shooting Star

Criteria for both forms:

          Body-to-range ratio: body/range ≤ MinBodyRatio (small body)

          Shadow-to-body ratio: shadow/body ≥ MinShadowRatio (long shadow)

Pin Bars

General condition: total shadow length ≥ MinShadowRatio × body

Doji

          A candle is considered a Doji if the difference between open and close does not exceed a specified number of points

          The marker is placed in the middle of the range (high + low) / 2

Morning / Evening Star (3-candle patterns)

 Morning Star (bullish reversal):

1.         Candle 0: bearish (close < open)

2.         Candle 1: small body (body ≤ 0.5 × body[0])

3.         Candle 2: bullish, closes above the midpoint of the first candle's body

 Evening Star (bearish reversal):

1.         Candle 0: bullish

2.         Candle 1: small body

3.         Candle 2: bearish, closes below the midpoint of the first candle's body

 Both patterns are automatically flagged as strong signals (StrongBuffer)

Notification System

          When any pattern triggers, a message is generated:

"[Pattern Name] on [Symbol] [Time]"

          Notifications are sent only if the following flags are enabled:

          ShowAlerts — pop-up window in the terminal

          ShowPush — push notification to a mobile device

Calculation Loop (OnCalculate)

1.         Optimization: recalculation starts from the last modified bar (prev_calculated)

2.         Buffer reset: all values are initialized as EMPTY_VALUE

3.         Skip initial candles: 3-candle patterns require a minimum of 3 bars

4.         Calculation of each candle's parameters: body, range, shadows, direction

5.         Sequential check of all enabled patterns

6.         Signal recording to the corresponding buffers with a price offset (± _Point * 5)