It is a well known behavioural fact that humans have a round number bias. We just like round numbers. During a visit to the gym recently keeping the RPM’s over 100 was a keen aim. If the RPM’s dropped under 100 something psychologically kicked in to give an extra push in order to hit the ‘big round number’.
This phenomena turns up all over the place. Look at the London Marathon finishing times and how they cluster around the big round numbers of 3 hours, 3:30 hours, and 4 hours.
Most of us are very familiar with pricing that keeps under a big round number. Most goods for about £3 will be priced as £2.99. Staying clear fo the ‘£3’ label, even by a penny, means more sales will be encouraged.
Humans love big round numbers as key reference points. You will have noticed this yourself when you say ‘I will close my position when my equity hits £10,000’ or ‘I will sell the stock when it reaches $100’. This means that traders need to be aware of this impact when trading.
The big round number effect
Whenever you are trading, this has a number of implications for placing orders.
For limit orders: Place buy or sell limit orders at, or near, big round numbers.
For a take profit : Place your TP just a few points BELOW a big round number
For a stop loss: Place your SL just a few points BELOW a big round number.
Also, keep a careful eye out for how big round numbers act as key support and resistance numbers. You will see how influential they are.
Our products and commentary provides general advice that do not take into account your personal objectives, financial situation or needs. The content of this website must not be construed as personal advice.
Editors’ Picks

EUR/USD Gains look limited by 1.1570 Premium
EUR/USD trades well on the defensive for the second day in a row, revisinting the mid-1.1300s on the back of the continuation of the upside impulse in the US dollar. The move followed firmer US PMI data and news indicating the White House may be considering tariff cuts on Chinese imports.

GBP/USD deflates to the sub-1.3300 area, USD bulls prevail
GBP/USD remained on the back foot Wednesday, slipping below the 1.3300 level as the Greenback gained further traction. The Dollar’s solid performance was supported by strong US data and fading concerns over a renewed escalation in the US–China trade dispute.

Gold corrected extreme conditions, struggles around $3,300
Gold extended its decline on Wednesday, slipping below the $3,300 mark per troy ounce in response to reports from the media suggesting the Trump administration is weighing tariff reductions on Chinese goods, a news that revived hopes of easing trade tensions and reduced demand for the yellow metal as a safe-haven asset.

Bitcoin bullish momentum builds as premium exceeds 9% for first time in three months
Bitcoin price is extending its gains, trading above $94,000 at the time of writing on Wednesday, following a two-day rally of 9.75% so far this week. BTC rally gathers momentum as trade war fears ease, following US President Donald Trump’s downplaying of tensions with China.

Five fundamentals for the week: Traders confront the trade war, important surveys, key Fed speech Premium
Will the US strike a trade deal with Japan? That would be positive progress. However, recent developments are not that positive, and there's only one certainty: headlines will dominate markets. Fresh US economic data is also of interest.
RECOMMENDED LESSONS
Making money in forex is easy if you know how the bankers trade!
Discover how to make money in forex is easy if you know how the bankers trade!
5 Forex News Events You Need To Know
In the fast moving world of currency markets, it is extremely important for new traders to know the list of important forex news...
Top 10 Chart Patterns Every Trader Should Know
Chart patterns are one of the most effective trading tools for a trader. They are pure price-action, and form on the basis of underlying buying and...
7 Ways to Avoid Forex Scams
The forex industry is recently seeing more and more scams. Here are 7 ways to avoid losing your money in such scams: Forex scams are becoming frequent. Michael Greenberg reports on luxurious expenses, including a submarine bought from the money taken from forex traders. Here’s another report of a forex fraud. So, how can we avoid falling in such forex scams?
What Are the 10 Fatal Mistakes Traders Make
Trading is exciting. Trading is hard. Trading is extremely hard. Some say that it takes more than 10,000 hours to master. Others believe that trading is the way to quick riches. They might be both wrong. What is important to know that no matter how experienced you are, mistakes will be part of the trading process.

The Best brokers to trade EUR/USD
SPONSORED Discover the top brokers for trading EUR/USD in 2025. Our list features brokers with competitive spreads, fast execution, and powerful platforms. Whether you're a beginner or an expert, find the right partner to navigate the dynamic Forex market.