Judas Swing Calculator
Identify and calculate the parameters of ICT Judas Swing setups in session opens. Enter values for instant results with step-by-step formulas.
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The false move is measured from the session open to the Judas Swing extreme. The true move is from the session open to the current price in the opposite direction. The Judas Ratio shows how far the true move has traveled relative to the trap. ADR context determines remaining range potential.
Last reviewed: December 2025
Worked Examples
Example 1: Bearish Judas Swing at London Open
Example 2: Bullish Judas Swing at New York Open
Background & Theory
The Judas Swing Calculator applies the following established principles and formulas. Foreign exchange markets facilitate the conversion of one currency into another and serve as the largest and most liquid financial markets in the world, with daily turnover exceeding seven trillion US dollars. Exchange rates are quoted as currency pairs, expressing the price of one unit of a base currency in terms of a quote currency. For example, a EUR/USD rate of 1.0850 means one euro buys 1.0850 US dollars. The smallest standardized price movement in most pairs is the pip, typically the fourth decimal place, with a value of 0.0001 per unit for USD-denominated pairs. The bid price is the rate at which a dealer will buy the base currency, while the ask price is the rate at which it will sell. The spread between bid and ask represents the dealer's compensation and varies with liquidity and volatility. Leverage amplifies both gains and losses by allowing traders to control positions larger than their deposited margin. A 100:1 leverage ratio means a one-percent adverse move eliminates the entire margin, making position sizing and risk management critical. Two parity conditions from international economics anchor exchange rate theory. Purchasing Power Parity (PPP) holds that exchange rates should adjust over time so that identical goods trade at equivalent prices across countries: S = P_d / P_f, where S is the spot rate and P_d and P_f are domestic and foreign price levels. PPP performs well over long horizons but poorly in the short run due to trade barriers, non-tradable goods, and capital flows. Covered Interest Rate Parity (CIRP) is a near-arbitrage condition stating that forward exchange rate premiums or discounts exactly offset interest rate differentials between two currencies: F/S = (1 + r_d) / (1 + r_f). Deviations from CIRP create riskless arbitrage opportunities that traders rapidly eliminate. Uncovered Interest Rate Parity posits that high-yielding currencies should depreciate to offset their interest advantage, though empirical evidence is mixed and the carry trade — borrowing in low-rate currencies to invest in high-rate ones — has generated persistent returns.
History
The history behind the Judas Swing Calculator traces back through the following developments. For much of the nineteenth century and early twentieth century, the international monetary system operated under the classical gold standard, under which each participating currency was fixed to a defined weight of gold, making bilateral exchange rates effectively constant. The system provided price stability and facilitated global trade but constrained governments' ability to respond to economic downturns. World War One shattered the gold standard as nations suspended convertibility to finance wartime expenditures. The interwar period saw attempts to restore gold convertibility, most notably the British return to the gold standard in 1925 at the pre-war parity, a decision criticized by John Maynard Keynes as deflationary. The Great Depression forced widespread currency devaluations and the effective collapse of the international gold standard by the early 1930s. The Bretton Woods Conference of July 1944 established a new order in which member currencies were pegged to the US dollar, while the dollar alone was convertible into gold at 35 dollars per troy ounce. The International Monetary Fund and World Bank were created at the same conference to oversee the system. Bretton Woods delivered exchange rate stability during the postwar growth era but came under strain as US deficits and European dollar accumulation outpaced American gold reserves. On August 15, 1971, President Nixon announced the suspension of dollar-gold convertibility — the so-called Nixon Shock — effectively ending the Bretton Woods system. By 1973, major currencies had transitioned to floating exchange rates determined by market supply and demand, a regime that has persisted. On September 16, 1992, hedge fund manager George Soros shorted the British pound against the European Exchange Rate Mechanism constraints, forcing the UK's withdrawal in what became known as Black Wednesday. Electronic trading platforms emerged in the 1990s and 2000s, replacing voice-brokered interbank markets and dramatically reducing transaction costs for institutional and retail participants alike.
Frequently Asked Questions
Formula
Judas Ratio = True Move / False Move
The false move is measured from the session open to the Judas Swing extreme. The true move is from the session open to the current price in the opposite direction. The Judas Ratio shows how far the true move has traveled relative to the trap. ADR context determines remaining range potential.
Worked Examples
Example 1: Bearish Judas Swing at London Open
Problem: EUR/USD opens London session at 1.0850. Price sweeps up to 1.0880 (30 pips false move) then reverses. Current price is 1.0820. ADR is 80 pips. Analyze the setup.
Solution: Session Open: 1.0850\nFalse Move High: 1.0880 (Judas Swing = 30 pips up)\nTrue Move: 1.0850 - 1.0820 = 30 pips down so far\nJudas Ratio: 30/30 = 1.0 (true move equals false move)\nFalse Move % of ADR: 30/80 = 37.5%\nRemaining ADR: 80 - 60 = 20 pips potential\nProjected Target: 1.0880 - 0.0080 = 1.0800
Result: Bearish Judas confirmed | False: 30 pips | True: 30 pips so far | Target: 1.0800 | Judas Ratio: 1.0
Example 2: Bullish Judas Swing at New York Open
Problem: GBP/USD opens NY session at 1.2650. Price dips to 1.2620 (sweeping London low) then reverses up. Current price is 1.2680. ADR is 100 pips.
Solution: Session Open: 1.2650\nFalse Move Low: 1.2620 (Judas Swing = 30 pips down)\nTrue Move: 1.2680 - 1.2650 = 30 pips up so far\nJudas Ratio: 30/30 = 1.0\nFalse Move % of ADR: 30/100 = 30%\nRemaining ADR: 100 - 60 = 40 pips potential\n-1.618 extension from false move: 1.2620 + (0.0030 x 1.618) = 1.2669\n-2.618 extension: 1.2620 + (0.0030 x 2.618) = 1.2699
Result: Bullish Judas confirmed | False: 30 pips | True: 30 pips so far | Ideal setup (30% ADR) | 40 pips remaining
Frequently Asked Questions
What is the ICT Judas Swing and why is it called that?
The ICT Judas Swing is a deceptive price movement that occurs at the open of a trading session, named after the biblical figure Judas who betrayed with a kiss. In trading terms, the market initially moves in one direction at the session open (the false or Judas move) to sweep liquidity and trap early traders, before reversing sharply in the true intended direction. This concept was popularized by Michael J. Huddleston (ICT) as part of the Smart Money Concepts framework. The Judas Swing typically occurs during the first 30-90 minutes of the London or New York session, making it a predictable pattern for traders who understand institutional order flow mechanics.
How do you identify a Judas Swing setup in real time?
Identifying a Judas Swing requires monitoring the session open during killzone hours. First, note the session opening price at the London open (2 AM EST) or New York open (7 AM EST). Watch for an initial move in one direction that sweeps an obvious liquidity level such as the previous session high or low, an Asian range extreme, or a short-term swing point. The false move typically covers 15-30% of the Average Daily Range. Look for signs of exhaustion including long wicks, decreasing volume, and failure to hold above or below the swept level. When price reverses back through the session open with displacement (strong momentum candles), the Judas Swing is confirmed and the true move is underway.
What role does the Average Daily Range play in Judas Swing analysis?
The Average Daily Range (ADR) is crucial for Judas Swing analysis because it provides context for how far the false move and true move should travel. The false move (Judas swing) typically consumes 15-30% of the ADR, while the remaining 70-85% is available for the true directional move. If the false move exceeds 40-50% of the ADR, the setup becomes less reliable as too much of the daily range has been used. Traders use ADR to set realistic profit targets: if the ADR is 80 pips and the false move consumed 20 pips, the true move has approximately 60 pips of potential range remaining. This helps with trade management and setting expectations for the day.
During which trading sessions do Judas Swings most commonly occur?
Judas Swings most frequently occur during the London session open (2-5 AM EST) and the New York session open (7-10 AM EST), which ICT refers to as killzones. The London killzone Judas Swing often targets the Asian session high or low before reversing. The New York killzone Judas Swing may target the London session extreme or a key daily level. The London session tends to produce the most reliable Judas Swings on EUR/USD and GBP/USD, while the New York session is more relevant for USD pairs and indices. The overlap period between London and New York (8-11 AM EST) can produce Judas Swings on any major pair due to increased institutional participation.
What is the relationship between Judas Swing and liquidity sweeps?
The Judas Swing is fundamentally a liquidity sweep mechanism. The false move at the session open is designed to trigger stop-loss orders placed beyond obvious levels such as previous session highs and lows, Asian range extremes, and swing points visible to retail traders. When these stops are triggered, they create counterparty liquidity that institutions need to fill their large orders in the opposite direction. For example, a bullish Judas Swing sweeps below a low, triggering sell stops which provide the buy-side liquidity institutions need to enter long positions. Understanding this connection between the Judas Swing and liquidity is essential because it explains the mechanical reason why the pattern works and helps traders identify which levels are likely targets for the false move.
How do you determine if the Judas Swing false move is complete?
Several confirmation signals indicate the false move is complete and the reversal is beginning. First, look for a market structure shift (MSS) on the lower timeframe (1-5 minute chart) where a swing high or low is broken against the false move direction. Second, watch for displacement candles showing strong momentum in the reversal direction with large candle bodies and small wicks. Third, check if the false move has swept a significant liquidity level such as the previous session extreme or Asian range high/low. Fourth, time confirmation matters as most Judas Swing reversals complete within 30-90 minutes of the session open. Fifth, the formation of a Fair Value Gap in the reversal direction provides additional confirmation of institutional commitment to the true move direction.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy