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Hypothetical example · $100k capital · $15k lots · −2% / +12.5% · not a forecast.

The idea

How a dip-buy works

Capital is split into equal lots. The first lot buys at the starting price. A new lot is added only when price is a set percent below the lowest open lot. Each lot sells on its own when it is a set percent above its own buy — cheaper lots reach that target first. Cash spent on a buy comes back when that lot sells (plus the gain, if the target was hit) and can buy again on a later dip.

Toy example — not a real stock. $30,000 capital · $10,000 lots · −2.5% to add · +12.5% to sell.

Dip-buy toy path from $100 down to $95, then up through $107 and $110 Price starts at $100 with buy 1, dips to $97.50 for buy 2, then $95 for buy 3. It rallies to about $107 and sells the $95 lot, then about $110 and sells the $97.50 lot. The $100 lot stays open. Cash falls from $30,000 to $0 after three buys, then returns to $22,500 after two sells, with $2,500 simulated P&L. $110 $107 $100 $95 1 2 3 1 2 3 4 5 Buy Sell Still open Sold lot
Black line is price. Bars under the chart are the three lots — each from its buy to its sell (or still open).
  1. Buy at $100. First $10,000 lot. Cash $30,000 → $20,000
  2. Buy at $97.50. Price is 2.5% below the lowest open lot ($100). Cash $20,000 → $10,000
  3. Buy at $95. Another 2.5% below the new lowest lot ($97.50). Third lot. Capital is fully in the stock. Cash $10,000 → $0 · 3 lots open
  4. Sell at about $107. The $95 lot is up 12.5% ($95 × 1.125 ≈ $106.88). Only that lot sells. About $11,250 cash returns. Cash $0 → $11,250 · simulated P&L +$1,250 · 2 lots left
  5. Sell at about $110. The $97.50 lot hits +12.5% ($97.50 × 1.125 ≈ $109.69) and sells. The $100 lot is still open — it needs $112.50. Cash $11,250 → $22,500 · simulated P&L +$2,500 · 1 lot still open

Hypothetical illustration, not a forecast and not a backtest. The form below runs the same add-on-dip / sell-on-gain rules on real hourly US prices.

No account · no subscription · Apple Pay or Google Pay

Run a dip-buy grid on the last 12 complete months of hourly US equity data.

You set capital, lot size, the dip that adds a lot, and the gain that sells it. Buys fill the next hour’s open (no look-ahead). Sells are a limit at your gain % — filled at that limit unless the open gaps through. Whole shares only. Flat $1. You get a one-time code, then the book, the benchmark, and the risk.

This is a hypothetical, backward-looking simulation — not investment advice. One 12-month path is not a forecast. Grid strategies can still concentrate risk in a downtrend; a lot cap limits that, it does not remove it. Only currently listed symbols can be tested (survivorship bias). Modeled fees and slippage will not match every live fill, especially in thin names. Full disclaimer

Run a $1 backtest

Dates start blank. Tap Last 12 months or pick both dates. Gray text is an example only — it is not submitted until you type a value. Max open lots is Total capital ÷ Lot size, rounded down. $0 commission and 5 bps slippage are applied automatically.