Cbdr Calculator
Calculate the Central Bank Dealers Range using Asian session high and low for ICT analysis. Enter values for instant results with step-by-step formulas.
Calculator
Adjust values & calculateStandard Deviation Projections
Formula
The CBDR range is the distance between the Asian session high and low. Standard deviation projections multiply this range by N (0.5, 1.0, 1.5, 2.0, 2.5, 3.0, etc.) and add to the high or subtract from the low to create upper and lower projection levels.
Last reviewed: December 2025
Worked Examples
Example 1: Tight CBDR with London Expansion
Example 2: Wide CBDR Assessment
Background & Theory
The Cbdr 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 Cbdr 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
CBDR = Asian High - Asian Low; Projection = High + (CBDR x N) or Low - (CBDR x N)
The CBDR range is the distance between the Asian session high and low. Standard deviation projections multiply this range by N (0.5, 1.0, 1.5, 2.0, 2.5, 3.0, etc.) and add to the high or subtract from the low to create upper and lower projection levels.
Worked Examples
Example 1: Tight CBDR with London Expansion
Problem: Asian session produces a range of 1.0850 to 1.0880 (30 pips). Price is currently at 1.0920 during London session. Calculate CBDR projections.
Solution: CBDR Range: 1.0880 - 1.0850 = 30 pips\nMidpoint: 1.0865\n1.0 SD Upper: 1.0880 + 0.0030 = 1.0910\n2.0 SD Upper: 1.0880 + 0.0060 = 1.0940\n2.5 SD Upper: 1.0880 + 0.0075 = 1.0955\n3.0 SD Upper: 1.0880 + 0.0090 = 1.0970\n1.0 SD Lower: 1.0850 - 0.0030 = 1.0820\n2.0 SD Lower: 1.0850 - 0.0060 = 1.0790\nCurrent price 1.0920: 1.33 deviations above CBDR
Result: CBDR: 30 pips | Current: +1.33 SD | Next target: 2.0 SD at 1.0940 | Assessment: Normal range
Example 2: Wide CBDR Assessment
Problem: Asian session range is 1.2700-1.2760 (60 pips) on GBP/USD. How does this affect London expectations?
Solution: CBDR Range: 60 pips (Wide - above 50 pip threshold)\nMidpoint: 1.2730\n1.0 SD Upper: 1.2760 + 0.0060 = 1.2820\n1.5 SD Upper: 1.2760 + 0.0090 = 1.2850\n2.0 SD Upper: 1.2760 + 0.0120 = 1.2880\nAssessment: Wide range suggests reduced London expansion.\nExpected expansion: 1.0-1.5 SD maximum on normal day.\nDaily range already partially consumed by Asian session activity.
Result: CBDR: 60 pips (Wide) | Expected expansion: 1.0-1.5 SD | 2.0 SD target: 1.2880 (unlikely without news catalyst)
Frequently Asked Questions
How do you calculate the CBDR range and its standard deviation projections?
To calculate the CBDR, first identify the Asian session high and low (typically between 8 PM and midnight EST). The CBDR range is simply the high minus the low. Standard deviation projections are calculated by multiplying the range by various factors and adding to the high (for upper projections) or subtracting from the low (for lower projections). For example, if the CBDR is 30 pips with a high of 1.0880 and low of 1.0850, the 1.0 standard deviation upper projection is 1.0880 + 0.0030 = 1.0910, and the 2.0 SD is 1.0880 + 0.0060 = 1.0940. Common projections used are 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 4.0 standard deviations from the range boundaries.
How does the size of the CBDR range affect trading expectations?
The CBDR range size provides crucial context for the trading day ahead. A tight CBDR of less than 20 pips on major pairs like EUR/USD suggests low Asian session participation and typically precedes significant London session expansion, potentially reaching 3.0-4.0 standard deviations. A normal CBDR of 20-40 pips suggests regular market conditions with expansion likely reaching 2.0-2.5 standard deviations. A wide CBDR exceeding 50 pips indicates unusual Asian session activity, possibly from central bank intervention or major news, and typically means London expansion may be limited to 1.0-1.5 standard deviations since much of the daily range has already been used. Understanding this relationship helps traders set realistic targets.
What are the limitations and common pitfalls of CBDR analysis?
CBDR analysis has several important limitations that traders must understand. First, major news events during London or New York sessions can override CBDR projections, pushing price well beyond the typical 2.5 standard deviation target or failing to reach even the 1.0 level. Second, Monday CDBRs can be distorted by weekend gaps, particularly after eventful weekends. Third, the CBDR works best on major forex pairs with clear session separation and diminishes in effectiveness on exotic pairs or during holiday-thinned markets. Fourth, blindly fading price at projection levels without confirmation from market structure is a common mistake. Fifth, the CBDR is a probabilistic tool providing likely ranges, not exact levels. Traders should always use it in conjunction with market structure, order flow confirmation, and proper risk management.
How do you use CBDR for setting realistic daily trading targets?
Using CBDR for target setting involves a systematic approach. First, measure the Asian session range after midnight EST. Second, assess whether the range is tight, normal, or wide to set expectations for expansion magnitude. Third, identify the direction of the initial expansion move during London open. Fourth, set your first target at the 1.5-2.0 standard deviation level in the expansion direction. Fifth, if the 2.0 SD level is reached with strong momentum and the CBDR was tight, consider holding for the 2.5-3.0 SD level. Sixth, use standard deviation levels as reference points for partial profit-taking rather than all-or-nothing targets. A practical rule of thumb is to take 50% profit at 2.0 SD and let the remainder run with a trailing stop.
Why might my result differ from another tool or reference?
Differences typically arise from rounding conventions, the specific version of a formula (for example, simple vs compound interest), or unit inconsistencies between inputs. Check that both tools are using the same formula variant and the same units. The References section links to the authoritative source behind the formula used here.
What inputs do I need to use Cbdr Calculator accurately?
Each field is labelled with the required unit (metric or imperial). Gather your source values before starting — for example, a weight measurement in kilograms, a distance in metres, or a dollar amount — and enter them exactly as measured. The formula section on this page lists every variable and explains what each represents.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy