A Dynamic Grid That Switches from Fixed to Percentage Spacing
Summary
The article proposes a grid strategy intended to balance frequent trading with reduced risk of running out of funds during a sustained decline. It compares arithmetic grids, which use fixed price intervals and can exhaust their range, with geometric grids, which use fixed percentage intervals and can continue adding positions across a wider range of prices. It also notes that spreading capital across selected instruments may reduce the impact of a fall in any single asset.
The proposed hybrid uses arithmetic spacing early, while prices remain within a chosen band, then switches to geometric spacing once price moves beyond that band. An example illustrates the idea using a 100-unit reference price, 0.5-unit arithmetic steps, 1% geometric steps, and a switch after a 20% move. These are illustrative settings, not validated results. The article does not provide a backtest or derive optimal parameters, and it leaves position sizing and inventory management for later discussion. Its claim that geometric grids avoid breaking is presented without examining practical limits such as capital constraints or asset behavior.
Key ideas
- Arithmetic grids use fixed price intervals and may run out of range when prices move far enough.
- Geometric grids use percentage intervals and can continue operating across a wider range, though trading may be less frequent near the reference price.
- The proposed hybrid starts with arithmetic spacing and switches to geometric spacing after a sufficiently large price move.
- The example's interval sizes and switching threshold are illustrative parameters, not demonstrated optima.
- Instrument selection, diversification, capital limits, and position sizing affect the risks of grid trading.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.