Principle vs Stock Backtest

How long will you keep investing on gut feeling? Build your trading rules without code. Test them on US and Korean stocks. Combine moving averages, stop-loss, and partial take-profit to backtest your strategy. For education and entertainment only. Past simulation does not predict future results. Build rules. Let the data answer. -- Rule Builder - Set moving average periods, stop-loss, and take-profit with a few taps - No coding required, ready in 1 minute - Combine partial buy/sell, multi-stage take-profit, and more -- Historical Backtest - US and Korean daily stock data - 1 token per stock - Cached results reuse on identical conditions (no extra token) -- Result Analysis - Cumulative return chart - Buy/sell signal markers on the price chart - Maximum drawdown, win rate, average holding period and more -- Share Your Rules - Share your rules with friends - Import rules from others and backtest them yourself -- Invite Friends - Verify more, together - Share your invite code; when a friend signs up and enters it, - you and your friend each get 15 tokens (up to 10 invites per month) -- Token Packs - 4 token packs: 10 / 33 / 115 / 600 tokens - Larger packs include more bonus tokens -- Disclaimer - This app is an education and entertainment simulation tool. - This app does NOT provide investment advice, stock picks, or trading signals. - Backtest results are simulations based on past data and do not guarantee future returns. - This app is NOT connected to live trading. - The company assumes no responsibility for any losses in actual trading.

$500 a month in TQQQ for 10 years, starting with $500: on past prices from January 2016 to December 2025, with $60,500 paid in, this app's backtest ends at $438K. That is a past result. The same screen shows how far it fell on the way. BacktestLab runs that kind of question on past prices. Put monthly investing next to a single lump sum, or one portfolio next to another, and read them side by side. ■ Whole shares only Many calculators assume fractional shares. This one does not. It buys only the whole shares that the day's price allowed and carries the leftover cash forward. ■ Dividends, reinvested or kept Dividends arrive as cash on the payment date. Reinvest them to buy shares again at that day's price, or keep them as cash and see them counted separately from the final value. ■ Risk next to the return Maximum drawdown, the drawdown chart and named crisis windows sit in the result next to the final value. ■ Build a portfolio Up to ten weighted assets. Choose a rebalancing interval and the original weights are restored on that schedule. ■ Compare Two portfolios over the same period, under the same conditions, side by side. ■ The next 10 years, as an assumption Continue a result with an annual return you enter yourself. It is drawn as an assumption, not as a measurement. ――― This app is a calculator based on past data. It is not investment advice, and past results do not indicate future returns. Taxes and trading fees are not included. No account is created. Calculations run on your device, and your portfolios and saved runs stay there. Available in English and Korean.