“David is a fantastic developer! He is amazingly fast and yet truly takes the time to understand exactly what you are hoping to achieve.”
EmeraldTrading Technologies, Inc. · Est. 2014Client reviews
Client experience across Emerald’s history.
Verified Upwork reviews document completed projects from recent years. Direct testimonials preserved from Emerald’s former website show that the same care, expertise, persistence, and respect for clients’ money have defined the company from its early years.
Understanding the project
Clients describe the care Dave takes to understand what they are trying to accomplish before and during development.
“Did a great job and was very fair. I wouldn’t hire anyone else to do programming except David! He is extremely educated in what he does.”
“Dave is the consummate professional. He spent the time to make sure we understood what we would be getting. Would use again.”
Continuing work and reliability
Several reviews come from clients who continued working with Dave over multiple contracts or over a period of years.
“I have worked with Dave for years and he is the best in the business. He is always on time and delivers fantastic work. He has tremendous knowledge and experience.”
“Very professional and great to work with. I just opened another contract with David.”
“Very knowledgeable and completed projects on a timely basis”
Development and automation
Clients speak directly to Dave’s EasyLanguage and TradeStation knowledge across development, automation, and order handling.
“Trading options is complicated. Dave made it feasible for a non-coder to operate successfully.”
“If you’re trading on TradeStation and want to automate any part of your trading, call Dave for help. There’s none better.”
“Great job; very timely; we definitely would hire David again.”
“David is a topnotch EasyLanguage developer and I recommend his highly.”
“Dave has excellent TradeStation/EasyLanguage skills and I would not hesitate to use him again. His services are highly recommended.”
“Mr. David Cohn is extremely skill and professional, easy to work with and patient. First class all the way!”
Help, tutoring, and problem solving
These clients came to Dave for explanation, troubleshooting, or personal EasyLanguage help.
“I always got very professional help by David, he got me out of dead ends that I couldn’t resolve. Can fully recommend working with him!!!”
“Well worth the money, definitely knows his stuff. I have been using Tradestation for 20 years.”
“David Cohn was extremely helpful with improving and debugging an EasyLanguage script.”
“Dave is fantastic on all levels and extremely knowledgeable about tradestation. Will come back for more work when needed.”
About the Upwork reviews: The wording shown above is reproduced from Emerald’s Upwork job history. Client names are not displayed in the public completed-job listing. Only reviews whose complete wording was visible in the supplied Upwork record are included.
What traders have said over the years
A reputation established long before the latest review.
These testimonials were supplied directly by Emerald clients and published on Emerald’s former website. Obvious spelling and punctuation errors have been corrected; the clients’ wording is otherwise preserved.
Direct client testimonial
“Simply the best! Dave did what everyone else said could not be done. He is amazing. My custom job was completed on schedule and within budget. Truly a great customer experience. I highly recommend Emerald Trading Technologies, Inc.”
Direct client testimonial
“I’m an advanced TradeStation user and Dave has helped me automate three of my system’s processes on TradeStation. He came highly recommended from my broker, and I’m glad I went with him. What you can expect is a direct communicator, who makes sure he understands first and communicates second. His speedy replies, ways around unforeseen hurdles, and insights into my project’s requests were greatly appreciated. My project took seventeen revisions. With each step, Dave was focused on the task at hand, nimble in response to changes in specifications, and never lost his enthusiasm and professional demeanor.”
Direct client testimonial
“I highly recommend Emerald Trading Technologies to any trader. The process was carefully explained in our first conversation, and from that moment on I was extremely impressed with their professionalism. I am now on my third project with them. There is no wasting of time, and they are always looking for better ways to keep costs down—which is always appreciated. The finished product has been nothing short of stellar. I will be working with them for a long time to come.”
Featured direct client testimonial
“Working with you has been the most satisfying and comprehensive experience in coding investment strategies it has been my pleasure to enjoy. You have been a selfless warrior while holding my hand and maintaining patience and tolerance, doing what you did on your end to help me clarify, define, and refine the strategies and trade triggers I wanted to implement and customize into my style, preferences, and goals.”
Ed also described how Dave’s knowledge extended beyond the requested code: he recognized that platform and broker-dealer software issues—not the client’s strategy or Emerald’s work—were interfering with the completed system, and helped identify and resolve those problems.
Read Ed’s complete testimonial
Over the course of many years in several industries, and having worked my way up from janitor to owner, chairman, and CEO of many corporations, I have learned to recognize excellence and its value when I experience it.
I am happy to write to let you know that I was very happy when I found nothing but excellence, superb professionalism, knowledge, counsel, and integrity in all of my interactions with you and Emerald Technologies. Your service and advice are above and beyond the call of duty. The peace of mind I received from our relationship is priceless beyond any valuation.
Working with you has been the most satisfying and comprehensive experience in coding investment strategies it has been my pleasure to enjoy. You have been a selfless warrior while holding my hand and maintaining patience and tolerance, doing what you did on your end to help me clarify, define, and refine the strategies and trade triggers I wanted to implement and customize into my style, preferences, and goals.
Your ability to backtest, debug, and fine-tune trade entry and exit points has been totally amazing and astonishing.
In fact, if it wasn’t for the addition of your intimate knowledge of the inner workings of the broker-dealer system, the bugs in their system updates might never have been recognized and eliminated from interfering with my strategies. You went above and beyond the call of duty and selflessly volunteered the time necessary to work with them to help identify and fix those bugs, recognizing that my code request and your work were not the problem, and that I could not have the benefit of the work and product you were paid to make work for me due to the software issues and bugs of the third-party broker-dealer.
The selfless work and expertise you provided in that situation actually helped that broker fix their issues, thereby not only helping me get my final products, but also helping that broker and their other clients who experienced similar related issues with their strategies written by the programmers they hired. Without your expertise, the work of the other independent code developers wouldn’t have worked for their clients, so it all worked out, and everyone benefited thanks solely to you.
Thank you very much for all you have done. My level of confidence and trust in you gives me great comfort, which I have had little of working with others before I came across you. The peace of mind is greatly appreciated. Thank you for your professionalism and business ethics. I always appreciate our time working together and look forward to doing it again. You are the Best in The Business.
You are greatly appreciated. Anyone looking for help customizing their software strategies would be foolish to look anywhere else after finding you. I wish you and your company continued success. You certainly deserve it.
Feel free to share my endorsement with anyone requesting references.
Thanks again.
About these historical testimonials: They were supplied directly to Emerald for publication and appeared on Emerald’s former website. They are presented separately from independently submitted Upwork reviews.
Start with the idea
Tell Dave what you are trying to accomplish.
You do not need to arrive with a fully defined specification. Emerald works with you to turn the idea in your head into precise requirements and working EasyLanguage code.
Start a conversation ↗