Forget fundamentals. 4 everyday investors have made winning stock picks with a much simpler strategy.

Getty Images; Ava Horton/BI

• Some retail investors have picked winning stocks without utilizing extensive Wall Street insights.
• Instead, they're following Warren Buffett's strategy of investing in what you know.
• Paired with a broader diversification strategy, it's a great way to learn more about the market.

Say goodbye to Excel spreadsheets, financial statements, and fancy Bloomberg terminals. Some everyday investors have a secret weapon that's leading to winning stock picks.