Browsing Tag
datascience
130 posts
My trading system has a 73.5% win rate and loses money. Here is the diagnostic that found it.
I spent a few days auditing a live FX system I built, over 16 years of history. The…
Bootstrapped Data Products — Here’s What I Learned
I’m Heshan. I build data products. No VC, no team — just me, a lot of Playwright scripts,…
# How I Built a Retail Demand Forecasting App with Python and Streamlit
By Okparaji Wisdom | Data Scientist | Nigeria Retailers in Nigeria lose millions of naira every year to…
How I Batch-Process 100K Rows with LLMs Without Losing My Mind (or My Money)
I had a 158,000-row product catalog. Each row: a free-text description. I needed structured attributes out of it:…
Time-Series Databases vs. Relational Databases, What is the Difference
Introduction Many teams default to relational databases because they are familiar and versatile. For business systems, that choice…
Understanding Data Modeling in Power BI: Joins, Relationships, and Schemas Explained
Data modeling is how you structure your tables so Power BI understands how they connect. Get it right,…
Why Data Rarely Disappears From the Internet
Data feels temporary. You delete a post. Remove a file. Close an account. From the interface, it looks…
The Last Actor Goes Live: What Happens When Your Korean Fashion Scraper Hits Pay-Per-Event
On March 25, 2026, my Musinsa ranking scraper becomes the 13th — and final — Korean data Actor…
How to build a free HN data pipeline in 30 minutes
Hacker News is one of the richest sources of signal in tech. New frameworks, hiring waves, shifting sentiment…
How to Detect Energy Sentiment Anomalies with the Pulsebit API (Python)
How to Detect Energy Sentiment Anomalies with the Pulsebit API (Python) We recently observed a striking anomaly in…
