TraderStacks price changeshttps://traderstacks.com/price-changesPricing and naming changes detected in trading software we track. Education only.en-usThu, 22 Oct 2026 12:00:00 GMTTradeZella: Plan prices differ from our earlier recordhttps://traderstacks.com/tools/tradezellats-pc-tradezella-2026-10-22Thu, 22 Oct 2026 12:00:00 GMTBefore: $29/month billed monthly or $288/year; Pro $399/year (our Oct 20 record). Now: Essential $35, Pro $59, Ultra $99 per month billed monthly; $315, $531, $891 per year billed yearly. Source: https://www.tradezella.com/pricingMassive (formerly Polygon.io): Rebrand: Polygon.io is now Massivehttps://traderstacks.com/tools/polygonts-pc-polygon-2026-10-22Thu, 22 Oct 2026 12:00:00 GMTBefore: Polygon.io at polygon.io; individual plans from $29/month to $199/month (our Oct 20 record). Now: Massive at massive.com; individual plans from $29/month to $199/month (no price change seen). Source: https://massive.com/pricing