Drawbacks of Backtesting in Forex

October 14, 2024

Informational

A person analyzes stock market charts displayed on a laptop, a monitor, and a printed sheet at a desk, preparing to back test forex strategies for prop trading firms in Chicago.

Trading is a learned skill that requires a lot of practice, especially when dealing with the foreign exchange, or forex. One way of discovering how to trade is with backtesting in forex, which uses historical data analysis to make an educated guess on the best way to trade for good results. A lot can go wrong if you make a mistake, so it’s crucial to have an educated team on your side.

Black Eagle Financial Group, a prop trading firm in Chicago, works with advanced traders for significant results. There are many drawbacks of backtesting in forex; keep reading to learn about them. When you need trading support, turn to Black Eagle Financial Group.

Understanding Backtesting in Forex

Backtesting in forex looks at the historical data in a simulated trading environment to determine the best way to trade your capital. Trading without any forethought will set you up for failure, though overthinking it also has its downsides. You can backtest yourself with your own research, or use automated backtesting with advanced programs. 

Manual Backtesting

Manual backtesting in forex requires you to check the historical data yourself. It will take lots of time, patience, discipline, and double or triple-checking your work to make sure you haven’t overlooked anything. The skills you will learn from this process are invaluable to you as a trader, but errors you make could be costly.

Automated Backtesting

Automated backtesting uses trading platforms to check the historical data for you. Some traders see the price points and prefer to do it themselves, but the automated way allows you to work quickly and make better headway on your research.

Lack of Proper Backtest Software

Perhaps one of the biggest forex backtesting limitations is having the right software. Price and accuracy are the two factors that can hold many traders back.

Low Accuracy

Many lower-cost programs for trading system validation have lower accuracy. While roughly 90% accuracy doesn’t sound bad, when you’re dealing with thousands or millions of dollars in trading, that 10% margin of error won’t cut it. You need a system you can trust that will eliminate most, if not all, errors.

High Costs

The programs with 99.9% accuracy require you to pay a pretty penny for such success which can hold many traders back. When you work with Black Eagle Financial Group, you’ll get fair pricing based on your needs that will make automated backtesting in forex more affordable.

Improper Forex Trading Strategy

No trader wants to lose out on profits, but you’ll do just that if you don’t have the right education or mentorship program to point you in the right direction. Backtesting is a crucial step, but if you don’t consider the details like sample sizing and additional costs, it will be as if you never researched at all.

Small Sample Size

The more backtesting you do, the more accurate your forecast will be. That being said, large samples are better than small samples. A sample size of 1,000 trades is more telling than one of 100 trades; the larger backtest will show you things you wouldn’t see with the smaller.

Curve Fitting

Curve fitting takes the results of your backtest and tweaks them for better numbers. You may want to remove a bad month that drastically brought down your profits. Removing the month makes the numbers look better, making your trading plan look more successful.

But just because your plan looks good on paper doesn’t mean it will look as good in the live market, especially if you removed all the cases of loss or low profits.

Forgetting Additional Costs

Many traders tend to forget to factor in commission costs or slippage. Doing so will make your backtesting results look more profitable, and you’ll assume you have a solid plan. But after the fees go through, you’ll see much less profit in the live market.

Black Eagle Financial Group provides custom reports for absolute transparency so you can plan all your backtests and live trading accordingly.

Ignoring the Changing Market

The trades you love today may not have been viable a decade ago. Consider how the market ebbs and flows when building a backtest in forex. When backtesting, it’s better to check the past two years than several decades, because the numbers rise and fall significantly.

Human Emotions Get in the Way

As professional as you may be as a trader, you’re still a human with feelings. Those pesky feelings could cloud your thought process and cause you to make trade decisions that are too risky or cautious. It’s important to keep your feelings in check when backtesting and dealing with the live market.

Impatience

Patience is key when backtesting. Ideally, you should set up a demo trade that doesn’t use real money to test the waters and see what you can do in the live market. While you play with demo trading, you can run ample backtesting to see how the live market compares.

Fear

Fear can hold you back from trading. Whether you’re worried about not making enough profits or improper capital security, that nagging feeling inside can prevent you from reaching your full potential. Working with a proprietary trading firm can relieve anxiety from even the most experienced traders.

Greed

If fear isn’t your problem, greed could be. Some traders don’t know when you let up off the gas and make investments they shouldn’t have. Too little profits could drain your capital and make trading large amounts in the future tricky.

Seeing a highly successful backtest could cause you to go all-in in the live market, which is hazardous if you fell into the bad habit of curve fitting or failing to consider fees.

The Lack Thereof

Having emotions when trading is good and necessary, but not having them is also an issue. Fearlessness leads to greed, and fear leads to missed opportunities. You must balance the scale and have enough emotion to be smart, but not so much that you make huge mistakes.

Biases Can Skew Results

Along with emotions, you also have biases, including:

  • Data snooping: As you research historical data, you may find patterns that look good on paper and choose to stick with those. Just because they worked in the past doesn’t mean they’ll work in the future, leaving you with skewed results.
  • Picking and choosing: You may avoid or prefer certain trades due to their performance or personal feelings toward them. This is more common in manual backtesting, which is another reason why automatic backtesting in forex is the better way to handle it.

Black Eagle Financial Group Handles Backtesting in Forex

If you need a proprietary trading firm and financial organization you can trust for trading and backtesting in forex, turn to Black Eagle Financial Group. We offer advanced routing options and Nightvision for professional traders. Avoid painful forex trading mistakes and get in touch with us today to learn more.

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Written by the Black Eagle Financial Group Team

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