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Ask HN: What non-AI products are you working on?

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Re: Ask HN: What non-AI products are you working on?

#151
I've been building algorithmic trading models for the last 4+ years. After trading them successfully with my own capital for more than a year, I launched https://grizzlybulls.com as an alternative to the traditional hedge fund monetization path.

Since launching in January 2022, we've significantly outperformed the market with lower volatility and reduced max drawdown:

Model - Return - Max drawdown

S&P 500 (benchmark): +9.91% -27.56%

Platinum: +45.34% -16.48%

Gold: +39.53% -19.12%

Silver: +17.24% -22.96%

Bronze: +14.12% -23.93%

Vix Basic: +9.81% -24.23%

TA - Mean Reversion: +17.77% -19.92%

TA - Trend: +17.29% -24.98%

This is an unleveraged, apples to apples comparison. These are not high frequency trading models. Most of them only make a trade every 2-4 weeks on average. During long signals, the models are simply long the S&P 500 and during short signals, they go to cash. This can be implemented very tax efficiently by holding a core ETF long position that never gets sold and then selling S&P 500 futures (ES or MES) of equal value to the ETFs against the long position. This way your account will accumulate unrealized capital gains indefinitely and you'll only pay tax on the net result of successful hedging. The cherry on top is that the S&P 500 futures are section 1256 contracts that are taxed at 60% long term / 40% short term capital gains rates regardless of the duration they are held.

The models use a variety of indicators, many of them custom built. Most important are various VIX metrics (absolute level, VIX futures curve shape/slope, divergences against S&P 500 price, etc), trend-following TA metrics (MACD, EMV, etc), mean-reversion TA metrics (Bollinger Bands, CMO, etc), macroeconomic (unemployment, housing starts, leading composite), and monetary policy (yield curve inversion, equity risk premium, dot plot, etc). They've been backtested very cautiously to avoid overfitting.

Re: Ask HN: What non-AI products are you working on?

#152
post #124

Been working on making learning German just a little bit more fun with interactive stories: https://learnoutlive.com/stories/

This looks cool! What level of proficiency do users need to be at to start with your app? Would this be a match for someone who's coming in with zero German?

Thanks! I'd say it depends a bit on your mother-tongue and general sense for languages, but yes, this is based on a very intuitive approach to language learning where you infer meaning from context, and even absolute beginners should be able to pick up some basic phrases.

Re: Ask HN: What non-AI products are you working on?

#153

I'm building https://ambiph.one , an ambient music/white noise/soundscape web app. It's a free alternative to apps which have a monthly fee or are covered in ads. Lots of lovely feedback from people who've found it useful for sleep, tinnitus, focus, ADHD etc Just launched a PWA and now working on more mixing features like spatial audio, reverb and high/low-pass filters to let you create even more immersive sound envi…

I honestly love love love this since this post https://news.ycombinator.com/item?id=38856999 and have recommend it to half a dozen of people at least. Great work! And free! \o/

Re: Ask HN: What non-AI products are you working on?

#154
Currently working on a prototype "fuzzer" for react components, where the input is programmatic interaction with said component (clicks, typing, toggling), and the output is graphical representation of all possible states this component can get into. This is tracked through code execution, but ultimately displayed in DOM form.

Sort of an attempt at automatic yet structured ui testing for both stress testing frontends and product design

Re: Ask HN: What non-AI products are you working on?

#155

A new terminal emulator [0] from scratch. It's native and cross-platform for Windows, Mac, and Linux. This is a product with a history of overpromising on the release date, but I'm being more realistic with the roadmap and streaming progress on Twitch. If it helps think of it as the indie, non-AI version of Warp [1]. [0] https://terminal.click [1] https://warp.dev

I know it's crass, but why? Aren't terminals good enough

I wish somebody built an emulator as fast as xterm and as configurable as something like kitty. Until then, xterm it is.

Re: Ask HN: What non-AI products are you working on?

#157

Just for fun, I'm writing an internet forum software from scratch, strongly inspired by phpBB and the likes. It is split into an Angular UI, C# ASP.NET Core RESTful API and postgres database. I aimed to let EF Core handle the data model in the database and am pleasantly surprised by how well it works. Also updating the database is a breeze with its migrations. The features of a forum seem easy enough, but I find it d…

I miss phpBB forums.

Got a link?

Re: Ask HN: What non-AI products are you working on?

#158

Improving the accuracy and robustness of gps on mobile devices -- https://www.zephr.xyz/ Real physics and computational communication problems. Crazy tech, fun stuff!!

I just looked at the field testing results and... wow! Not bad!

Re: Ask HN: What non-AI products are you working on?

#159

https://github.com/U8String/U8String which is a UTF-8 string library for C# that aims to offer rich and performant API to replace standard string for scenarios where you do want to consume UTF-8 directly. I'm working on it since last summer actually, it turned out to be much higher complexity project than expected :) Also comes with a few niceties like the ability to directly consume Streams, Sockets, WebSockets and…

I like this a lot, thank you. Have to try it out in a project. Is the default encoding when handling files UTF8 OR UTF8-BOM? Is both supported? Another question: in the readme you have this example `var joined = U8String.Join(',', boolean.Runes); // "T,r,u,e"` Why is " T" of true in uppercase?

That's what bool.ToString() defaults to which I'm matching. As for the file API, it's a bit unfinished as I'm re-consolidating logic into U8File (OpenRead and ReadLines work acceptably, U8File.Read works too - U8Reader is in a more polished state), but the intention for the files is to detect and strip BOMs (it already does that in most[0] places[1]).

There is way more heavy lifting that the library does on the "data goes in" side of things because "data goes out" story in .NET is already in a good shape with everything accepting ReadOnlySpan and ReadOnlyMemory - zero-allocation interpolated UTF-8 output into streams, sockets, etc. is achieved through extension methods and should you want to write UTF-8 BOM, you can simply do so beforehand working with the corresponding API directly.

However, if you have a particular use case in mind that you're interested in or have trouble with - do let me know as I'd love to have more user feedback!

[0] https://github.com/U8String/U8String/blob/main/Sources/U8Str...

[1] https://github.com/U8String/U8String/blob/main/Sources/U8Str...

Re: Ask HN: What non-AI products are you working on?

#160

I'm building https://ambiph.one , an ambient music/white noise/soundscape web app. It's a free alternative to apps which have a monthly fee or are covered in ads. Lots of lovely feedback from people who've found it useful for sleep, tinnitus, focus, ADHD etc Just launched a PWA and now working on more mixing features like spatial audio, reverb and high/low-pass filters to let you create even more immersive sound envi…

I honestly love love love this since this post https://news.ycombinator.com/item?id=38856999 and have recommend it to half a dozen of people at least. Great work! And free! \o/

That's so cool, thank you for recommending it!
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