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How to Backtest a Trading Strategy in Python Without Building a Framework From Scratch (One Evening)

You found a strategy idea — an SMA cross, a breakout, a mean-reversion fade. The fastest way to lose it is to spend three weekends building your own backtesting engine before you ever test it.

  • Acquire free stock or ETF data using yfinance library with two lines of code
  • Clean data by removing duplicates, filling gaps, and verifying high >= low
  • Utilize backtrader or vectorbt libraries for backtesting without building from scratch

Patch Tuesday November 2026: 1,093 fixes, 1 exploited. What to patch first

This article first appeared on varaxontech.com , where it is kept up to date. The short version Microsoft released fixes for 1,093 of its own CVEs on 10 November 2026 , after a record 1,408 in October…

  • Microsoft released 1,093 fixes on Patch Tuesday November 2026
  • Only 6 of 3,875 CVEs were on CISA's Known Exploited Vulnerabilities list
  • CVE-2026-124194 was exploited, making it the only bug rated Exploited

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