Earning the distinction of being eToro's first Female Elite Pro and achieving cult status among investors copying her on the popular social trading platform are just two of Heloïse Greeff's many triumphs. With a rich background in Artificial Intelligence, Greeff aka rubymza has successfully charted a career in trading by applying proven methods in trading strategies. To know more about this elite trader, be sure to read the rest of this page.

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Heloise Greeff Fact Card

Name: Heloïse Greeff
Nationality: South African
Based In: London, UK
Alma mater: University of Oxford, Doctor of Philosophy - PhD, Engineering Science
Saïd Business School, Master of Business Administration (MBA)
University of Oxford, MSc, Biomedical Engineering
Graduate School of Business - University of Cape Town, MPhil, Inclusive Innovation
University of Cape Town, BSc, Mechatronics Engineering
Title: Popular Investor, eToro
Research Associate, Wandham College, University of Oxford
Junior Research Fellow, Linacre College
Social media:


Heloise Greeff studied and finished her BSc in Mechatronics Engineering at the University of Cape Town from 2009-2012. Following her graduations, she attended Graduate School in the same University where she earned her MPhil in Inclusive Innovation in 2013. From 2013-2015, Greeff became the recipient of a Rhodes Scholarship grant that afforded her to earn an MSc in Biomedical Engineering and Master of Business Administration (MBA) at the University of Oxford.

In 2020, she became the first doctoral studentship funded by the UNICEF when she earned her Doctor of Philosophy (PhD) in Engineering Science from the University of Oxford.

Career History

Prior to starting her eToro trading career in 2016, Dr. Greeff trained as a mechatronics engineer in South Africa focusing her work on developing artificial intelligence for social good. She took her knowledge to rural places in Bangladesh and Africa where she led a team that developed innovative mobile technology for water sourcing and security.

Dr. Greeff also advocated for the increased role of engineers in social development by becoming a founding member of Engineers Without Borders South Africa. Aside from her engineering career and social causes, she was also appointed as co-convener of the Rhodes Scholarship for South Africa in Oxford University.

Her many hats include being a Research Fellow in Machine Learning at Oxford, a Board Member of MyRaphael Covatrix — an Australian biometric startup and an Oxford Enterprise and Innovation Fellow. Below are some of the recognitions and awards that she received:

  • One of the Fifty Inspiring Women in Tech in South Africa
  • MIT Global Startup Fellow
  • Co-winner of the Innovation Award given by the Oxford's Vice Chancellor
  • Bertha Scholarship recipient and Allan Gray Orbis Fellow in South Africa
  • Named as one of the judges of RAEng Africa Innovation Prize and IBM Watson AI XPrize Red

Trading in eToro

After several years of trading on eToro and being one of the most copied traders, Greeff now believes in the long-term potential growth of crypto and singles out Ethereum as a much better buy than Bitcoin.

Drawing some lessons from the pandemic that showed her the benefits of investing on high performing tech stocks, Greeff now chooses stocks based on their potential for vast cross-industry adoption in the years to come and its underlying technology.

“I’m not that heavily invested in driverless cars or any of those vibrant trends right now,” Greeff shares in one investment forum. “I’m thinking more about what the market will be like for this driver who has more free time now.”

Greeff now thinks that Blockchain is the one that garners the most interest of the trading public. "Cryptocurrency is a really easy way to introduce blockchain into society", Greeff said as if dropping hints to his copiers that she's ready to trade cryptos from now on.

Trading Methods

Dr. Greeff took advantage of eToro's demo account simulating trades of $100,000 until she quickly learned that trading in and out of positions every day was not a good idea. She then took to heart the importance of having patience and discipline in pulling off successful trades.

Drawing from her experience as an engineer who uses machine learning to study patterns, she started looking and analyzing trading patterns in the market. Doing so, she recognized the potential of the S&P 500 Index and noticed how several benchmarks high was being hit. It was then she decided to take on a conservative approach to her trading strategy. Since then, Greeff now retains a 60-stock portfolio with IBM and Mastercard being the two biggest.

Net Worth

To date, she has more than 19,000 copiers with over $5 million copy assets under management or AUM.

Since she started trading in 2016, Greeff has delivered an annual yield average of 30%.

Heloise Greeff is an Elite Pro Popular Investor
Heloise Greeff is an Elite Pro Popular Investor


With an average risk score of between 4-6, Greeff has made a total of 607 trades since 2016.

As shown by her eToro trading history, Greeff primarily trades on stocks which amounts to 75.5% of her over-all trades. This is followed with 12.15% ETFs, 7.40% Cryptos, 3.62% Indices, 1.15% Commodities and 0.16% in forex pairs.

Heloise Greeff's eToro portfolio
Heloise Greeff's eToro portfolio

Past performance is not an indication of future results. Trading history presented is less than 5 complete years and may not suffice as basis for investment decision.

Greeff’s top three frequently traded assets are NVIDIA Corporation (NVDA) with 81.48% profitability rate, Microsoft (MSFT) with 78.26% profitability rate and Ethereum (ETH) with 82.61% profitability rate. She averages 11.24 trades per week with an average holding time of 3 months and a 48.15% profitable week.


Heloise Greeff's annual performance on eToro

How to Follow?

Keep track of Greeff's trading activities and posts on her social feed by adding her to your watchlist. To do this, simply go to her profile and click on the "+" icon beside the Copy button. This will open a list of available watchlist categories where you can include this profile. You may choose any of the available categories or create your own watchlist.

Following Heloise Greeff
Following Heloise Greeff

How to Copy?

In order to copy this trader, you'll need to have a trading account first with eToro. Signing-up for an account with this brokerage firm will initially ask for a username, email address and a password and the process will only take around less than a minute to accomplish. After that, you'll need to verify your account and make an initial deposit so that you will have funds to allocate for copying Heloise Greeff's positions.

  1. Once you have an account with funds, all you need to do is to go to her profile. Greeff's eToro profile can be accessed here:
    Heloise Greeff (@rubymza) trading profile on eToro
    Heloise Greeff (@rubymza) trading profile on eToro
  2. Click on the "Copy" button. This will launch a pop-up window.
    Clicking Copy button
    Clicking Copy button
  3. Enter the amount that you'd like to allocate for copying this trader.
    Entering amount to copy Heloise Greeff on eToro
    Entering amount to copy Heloise Greeff on eToro
  4. You can also set the platform to stop copying if the copy value drops below a specific ratio or amount. Another parameter that you can configure is the "Copy Open New Trades". A check on the box will automatically copy any new positions that Greeff will open.
    Configuring copy trading parameters
    Configuring copy trading parameters
  5. Click the "Copy" button to execute the copy order.
    Executing copy trade order on eToro
    Executing copy trade order on eToro

Ready to copy this elite eToro trader?

eToro is a multi-asset platform which offers both investing in stocks and cryptoassets, as well as trading CFDs.

Please note that CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 77% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work, and whether you can afford to take the high risk of losing your money.

Past performance is not an indication of future results. Trading history presented is less than 5 complete years and may not suffice as basis for investment decision.

Copy Trading does not amount to investment advice. The value of your investments may go up or down. Your capital is at risk.

Cryptoasset investing is highly volatile and unregulated in some EU countries. No consumer protection. Tax on profits may apply.

eToro USA LLC does not offer CFDs and makes no representation and assumes no liability as to the accuracy or completeness of the content of this publication, which has been prepared by our partner utilizing publicly available non-entity specific information about eToro.

77% of retail investor accounts lose money when trading CFDs with this provider You should consider whether you can afford to take the high risk of losing your money.