Support & Resistance Calculator

Type: support_resistance • Category: flow • Tags: technical analysis, trading, support, resistance, pivot points, fibonacci, retracement, camarilla, woodie, donchian, psychological levels

Description

Calculate support and resistance levels using technical analysis methods

Parameters

Name	Type	Description	Required	Default
rowsExpr	string	Expr -> list[dict] (each dict contains OHLC data)	no
open	string	Open price column	no
close	string	Close price column	no
high	string	High price column	no
low	string	Low price column	no
methods	string	Methods to use for S/R calculation	no	["ta_extrema","fibonacci_retracement"]
lookback_period	number	Lookback period for fibonacci retracement and swing analysis	no	20
order	number	Extrema sensitivity: number of bars on each side (argrelextrema order)	no	5
atr_mult	number	Clustering tolerance multiplier relative to ATR	no	1
top_n	number	Maximum number of support/resistance levels to return	no	5
lookback_bars	number	If >0, use only the most recent N bars for extrema clustering	no	0
strict_side	boolean	If true, keep supports <= current price and resistances >= current price	no	false
max_distance_atr	number	If >0, filter levels to within N * ATR of current price	no	0
nearest_only	boolean	If true, reduce to the single nearest support and resistance	no	false
fib_ext_ratios	string	Comma-separated Fibonacci extension ratios (used by fibonacci_extensions)	no	"1.272,1.618,2.0,2.618"
channel_length	number	Lookback length for price channels (Donchian)	no	20
swing_top_n	number	How many recent swing highs/lows to include	no	5
psych_step	number	Step for psychological levels; 0 = auto	no	0
psych_count	number	Number of steps per side for psychological levels	no	5

Help

Calculate key support and resistance levels for technical analysis.

Available Methods:

• pivot_points: Classic pivot point calculation with S1-S3 and R1-R3 levels
• pivot_woodie: Woodie pivot points
• pivot_camarilla: Camarilla pivot points (S1-S4/R1-R4)
• fibonacci_retracement: Fibonacci retracement levels (0.236, 0.382, 0.5, 0.618, 0.786)
• fibonacci_extensions: Fibonacci extension targets (1.272, 1.618, 2.0, 2.618)
• recent_levels: Recent swing highs/lows as support/resistance
• swing_points: Output last swing highs and lows directly
• price_channels: Donchian price channels (upper/lower/mid)
• psychological_levels: Round-number levels around price

Input Data Format: Provide data expression that returns list of records with OHLC columns. Use the column selectors below to map your data fields.

How to Use:

1. Data Source:

• Set rowsExpr to an expression that returns list of records (e.g., from previous workflow steps)
• Example: data.fred_data or vars.my_ohlc_data

2. Column Mapping:

• Select which columns contain Open, High, Low, Close data
• The dropdowns will show available columns from your data

3. Analysis Methods:

• Choose calculation methods (pivot points, fibonacci, recent levels)
• Each method provides different types of support/resistance levels

4. Classic Pivot Points:

• Uses last candle OHLC for calculation
• Provides S1-S3 support and R1-R3 resistance levels

5. Fibonacci Retracement:

• Calculates levels based on recent high-low range (using lookback_period)
• Levels: 23.6%, 38.2%, 50%, 61.8%, 78.6% from recent high
• Powerful tool for identifying potential reversal zones

3. Recent Swing Levels:

• Finds local highs/lows in recent data
• Based on swing analysis (local maxima/minima)
• Shows where price has reversed recently

Parameters:

• rowsExpr: Expression returning list of records with OHLC data
• open/high/low/close: Column selectors for OHLC data (auto-populated from rowsExpr)
• methods: Calculation methods (default: ["ta_extrema", "fibonacci_retracement"])
• lookback_period: Lookback period for fibonacci retracement and swing analysis (default: 20)
• fib_ext_ratios: Comma-separated extension ratios for Fibonacci extensions (default: 1.272,1.618,2.0,2.618)
• channel_length: Period for price channels/Donchian (default: 20)
• swing_top_n: How many recent swing highs/lows to include (default: 5)
• psych_step: Step for psychological levels; 0 or empty = auto (default: auto)
• psych_count: Number of steps per side around price for psychological levels (default: 5)

Output:

• support_levels: Dict of support levels with level names as keys and values as level prices
• resistance_levels: Dict of resistance levels with level names as keys and values as level prices
• nearest_support/resistance: Closest level values to current price
• price_position: Relative position between nearest S/R (0-1 scale)
• current_price: Last close price for reference

Tips:

• Combine multiple methods for stronger signals
• Use longer timeframes for more reliable levels
• Pivot points work best on daily/weekly charts
• Moving averages work on all timeframes
• Recent levels are timeframe-specific

Trading Applications:

• Entry/exit signals at S/R levels
• Stop loss placement below support/above resistance
• Target setting at next S/R level
• Trend identification using MA slopes