Limit Grid Straddle Strategy Diagram

This diagram opens each grid cycle with two symmetric limit orders around the latest finished five-minute candle. A filled start order schedules one additional level in the same direction, while absolute take-profit protection closes the resulting position and a delayed mass-cancellation request clears the remaining limits.

schema

Strategy Overview

When the position is flat, one buy limit is placed 100 price units below the candle close and one sell limit is placed 100 units above it.
Filling either start order leaves the opposite start order active and schedules one same-side grid level for the next finished candle.
The additional buy level is 350 units below its start fill; the additional sell level is 350 units above its start fill.
Every start or grid fill is sent to Position protection with an absolute take-profit distance of 300 and no stop-loss.
A protective exit schedules mass cancellation for the next finished candle. Confirmation of that cancellation rearms the next grid cycle.

Entry and Exit Rules

Buy side: At the beginning of a flat cycle, register a buy limit at Close - Start Offset. After it fills, register one more buy limit at Average Fill Price - Grid Distance - Step Distance on the next finished candle.
Sell side: At the beginning of a flat cycle, register a sell limit at Close + Start Offset. After it fills, register one more sell limit at Average Fill Price + Grid Distance + Step Distance on the next finished candle.
Pending orders: A start fill does not cancel the opposite limit. Remaining start and grid limits stay active until the mass-cancellation stage.
Exit: Position protection submits a market exit when the candle close reaches a target 300 price units from a protected fill. No stop-loss boundary is enabled.

Parameters

Parameter	Default	Description
Candles	00:05:00	Time frame of the finished candles that drive the cycle.
Start Offset	100	Distance from the candle close to each start limit, in price units.
Grid Distance	300	Base distance from a start fill to its additional same-side level.
Step Distance	50	Increment added to Grid Distance for the additional level.
Take Profit	300	Absolute distance from a protected fill to its profit target.
Stop Loss	0	Absolute stop distance; zero disables the stop-loss boundary.
Trailing Stop Loss	false	Keeps trailing stop movement disabled.
Use Market Orders	true	Submits protective exits as market orders.
Volume	1	Volume of every start and grid limit order.

Diagram Details

Position is sampled on each finished candle and compared with zero. A Flag block allows only one symmetric start pair in a grid cycle.
Four Order registering blocks submit the buy start, sell start, buy grid and sell grid limits. There are no targeted cancellation blocks between the two start orders.
A start fill is retained in a Variable block. A two-event Delay consumes the fill-producing candle and releases the stored trade on the following finished candle, keeping the new registration outside the fill callback.
The stored trade is converted through Order.AveragePrice; Formula blocks then apply Grid Distance + Step Distance, which is 350 with the defaults.
Position protection handles each incoming fill separately. This bounded example does not calculate a shared volume-weighted target for several grid fills.
A protective fill arms another two-event Delay. Its output requests Order mass cancellation, and only a successful result resets the cycle Flag.
The chart displays five-minute candles, all four order streams and every strategy fill or exit.

Usage

Import the .json file into Designer, run it in the backtester on historical data, and adjust the distances and volume for the instrument's price scale and volatility before live trading.