Level Reaction & Doji Strategy

Overview

The Level Reaction & Doji Strategy is designed to catch high-conviction market turns at structural supply and demand zones. It automates the "wait for a level, wait for a candle" workflow used by professional price action traders.

The script detects Swing Highs/Lows to establish horizontal levels, monitors for Doji candles at those levels to identify exhausted momentum, and enters only when a Reaction (follow-through) candle confirms the reversal.

Strategy Mechanics

1. Level Detection (S/R)

Uses a configurable Swing Lookback (default: 20 bars). A Resistance level is formed when a high is higher than the 20 bars before and after it. Support is formed when a low is lower than the 20 bars surrounding it.

2. Doji Indecision

A candle is flagged as a Doji if its body size is 10% or less of its total range. This represents a perfect balance between buyers and sellers, often preceding a trend change.

3. The Three-Step Trigger

Step	Condition	Visual Indicator
Level	Price is within 0.2% of a detected S/R line	Dashboard: "YES"
Doji	Current candle body is ≤ 10% of range	Yellow Background / Dashboard: "✓"
Reaction	Next candle closes strongly in the reversal direction	BUY / SELL Label

On-Screen Visual Indicators

Real-Time Dashboard

Top-right table monitoring "Near Support," "Doji Detected," and "Entry Signal" statuses. Updates instantly on timeframe change.

Yellow Bar Zones

The background behind every Doji bar is highlighted in yellow for quick historical identification.

Structural Lines

Dynamic Red (Resistance) and Green (Support) lines that extend from detected swing points.

Signal Labels

Green "BUY" and Red "SELL" labels placed precisely at the confirmation candle close.

Risk Management (SENTINEL)

The strategy includes built-in execution logic compatible with the Vanguard engine:

Initial Capital: $100,000 USD
Take Profit: 100 Ticks (Configurable)
Stop Loss: 50 Ticks (Configurable)
Frequency: freq_once_per_bar_close

NIGHTHAWK Alert Payload

When an entry condition fires, strategy.entry(alert_message=msg) delivers the following JSON as the POST body to NIGHTHAWK. All fields are required — NIGHTHAWK returns 401 if secret is missing and 500 if model_id is not registered in the SENTINEL models table.

Long Entry (BUY — Support Doji Reversal)

{
  "secret":    "tac_com_alpha_9",
  "model_id":  "REACTION-DOJI-V1",
  "ticker":    "COINBASE:BTCUSD",
  "action":    "BUY",
  "price":     68240.50,
  "metadata": {
    "type":      "Support_Doji_Reversal",
    "level":     67800.00,
    "timestamp": 1745000000000
  }
}

Short Entry (SELL — Resistance Doji Reversal)

{
  "secret":    "tac_com_alpha_9",
  "model_id":  "REACTION-DOJI-V1",
  "ticker":    "COINBASE:BTCUSD",
  "action":    "SELL",
  "price":     68500.00,
  "metadata": {
    "type":      "Resistance_Doji_Reversal",
    "level":     68500.00,
    "timestamp": 1745000000000
  }
}

Manual Test Payload (FORCE MANUAL TRIGGER)

{
  "secret":    "tac_com_alpha_9",
  "model_id":  "REACTION-DOJI-V1",
  "ticker":    "COINBASE:BTCUSD",
  "action":    "TEST",
  "price":     68240.50,
  "metadata": {
    "note": "MANUAL_TRIGGER",
    "sup":  67800.00,
    "res":  68500.00,
    "timestamp": 1745000000000
  }
}

Field	Description
`secret`	Auth token — NIGHTHAWK returns 401 if missing or incorrect
`model_id`	Must match SENTINEL `models` table record exactly — currently REACTION-DOJI-V1
`ticker`	TradingView full symbol ID from `syminfo.tickerid`
`action`	BUY, SELL, or TEST
`price`	Close price at the reaction candle bar
`metadata.type`	Support_Doji_Reversal (long) or Resistance_Doji_Reversal (short)
`metadata.level`	The S/R level price that was respected — logged for signal analysis
`metadata.timestamp`	Unix millisecond timestamp from TradingView's `timenow`

Two Different Alert Types — Separate Alerts Required

Production signals (strategy.entry(alert_message=...)): TradingView alert condition = Order fills
Manual test (alert() from FORCE MANUAL TRIGGER): alert condition = Any alert() function call

3-Point Scoring Dashboard

The strategy includes a confluence scoring table in the top-right of the chart. Each of the three conditions scores one point independently — allowing you to see how close a setup is to firing even when not all conditions are met simultaneously.

Mission Condition

Status

Structural Level

✓

Doji Signature

✓

Reaction Breakout

✓

Tactical Score: 3 / 3

EXECUTE

Current Bias

BULLISH

Row	Variable	Green When
Structural Level (p1)	`at_support or at_resistance or at_support[1] or at_resistance[1]`	Price is or was within 0.2% of a key S/R level on current or prior bar
Doji Signature (p2)	`is_doji or is_doji[1]`	Current or prior bar qualified as a Doji (body ≤ doji_pct% of range)
Reaction Breakout (p3)	`bull_reaction or bear_reaction`	Current bar closed beyond the Doji's range in the reversal direction
Tactical Score	Sum of p1 + p2 + p3	Shows EXECUTE (green) at 3/3, WAIT (gray) below 3
Current Bias	`long_condition` / `short_condition`	BULLISH (long), BEARISH (short), NEUTRAL (no signal)

Using the Score to Monitor Setups in Progress A score of 2/3 means a setup is developing. Watch for the third condition to complete. For example: Level hit (p1=1) + Doji formed (p2=1) = score 2/3. Now wait for the reaction candle close to confirm p3 and fire the signal.