Timing Cost Simulator
What does missing the best days cost you?
Step out of the market and see the damage. Drag how many of the best (and worst) days you miss over a multi-year run and watch a buy-and-hold balance collapse — the core reason timing the market is so hard to win.
Open the toolSimulatorMoving Average Crossover Visualizer
Does the golden cross actually work?
Watch a golden-cross / death-cross strategy ride trends and whipsaw in choppy markets. Drag the fast and slow windows and the market’s character and compare returns, trade count, and drawdown against buy-and-hold.
Open the toolSimulatorRSI Oscillator Playground
When does overbought really mean sell?
Test an RSI mean-reversion rule and see why it wins in range-bound markets and fails in trends, where overbought stays overbought. Tune the period and thresholds and watch the signals, win rate, and returns.
Open the toolCalculatorDrawdown & Recovery Calculator
Why does a 50% loss need a 100% gain?
See the brutal asymmetry of losses: a 50% fall needs a 100% gain — and years — to undo. Drag the drawdown and recovery return and watch the gap, the maths behind why panic-selling near the bottom is so costly.
Open the toolSimulatorSeasonality Heatmap
Is "sell in May" actually real?
Explore the documented "Sell in May" / Halloween effect with an interactive monthly-returns heatmap. Dial the seasonal strength up and down and see why real seasonal patterns are small, noisy, and hard to trade.
Open the toolSimulatorDCA vs Lump Sum vs Timing
All at once, spread out, or wait?
Compare investing a lump sum, dollar-cost averaging it over months, or trying to time the dips with adjustable skill. See why lump-sum usually wins in rising markets and what DCA is really for.
Open the toolSimulatorFear & Greed Contrarian Simulator
Buy fear, sell greed — does it pay?
Test the contrarian rule — buy extreme fear, sell extreme greed — on a synthetic sentiment index. See where fading the crowd pays off and where a strong trend runs you over.
Open the toolSimulatorSystematic Model Sandbox
Combine signals — and meet overfitting
Blend a trend filter and a momentum filter with weights and a conviction threshold, then compare to each signal alone and buy-and-hold. See how combining can smooth the ride — and how every extra knob invites curve-fitting.
Open the toolMore tools are on the way.