Founder & CEO

Daniel Mayer Frank

I'm Daniel Mayer Frank, founder of Slingshot Studios, and I live in Sofia.

I have run businesses since I finished university in 2013. From 2014 to 2022 I was CEO of Franktrax, an affiliate network I built with my partner. He runs it now and I stay on as co-owner. My degree has nothing to do with any of this: I studied pop and jazz guitar at Bulgaria's National Academy of Music, back when the course took one guitarist a year.

Bitcoin's run in 2017 is what first made me watch markets. By 2022 trading was my main work, and by 2025 I was trading futures consistently on funded prop-firm accounts. Two things changed how I see it. A strategy that had worked for months stopped working, and a prop firm took most of an account's earned buffer over a rule that was not written anywhere. I'm an analytical person, so I stopped trusting gut feel and started testing everything I could. Most of what trading content claims did not survive. A real, lasting edge turned out to be rare and hard to find.

SaneSignals is what I built from that. Every rule in our tools is written down, and every result we publish can be re-checked in TradingView's own Strategy Tester. Quant Frankly is the research side: the quant analysis every SaneSignals product comes out of, and where we publish tests of popular trading claims. We use the open-source PyneCore engine to check that TradingView and our Python research produce the same trades, and I am its most active outside bug reporter: many of my 20 reports came with a proposed code fix, and 18 are now fixed in its releases.

I also co-founded ConvertScale, a separate software company.

Technical advisor (part-time)

Alexander Daskalov

Senior software engineer and Daniel's long-time business partner. He advises on our research engine and how we test it.