MidasMartingale lot size calculator: find the settings your deposit can carry
Say how far price may go against you, get the lot, orders or step
Same deposit, different shapes: basket tonnage
Balance $1 000, step $1.95, ×2, target move $60. For each number of orders: the largest start lot that still withstands that move, and the basket tonnage it gives, that is the total lots of the full basket. On a cent account it is also how many dollars of deposit each further $1 against the basket costs.
| Orders | Largest start lot | Basket tonnage, lots (= $ per $1) | Room to stop-out | Last order, from the first | Small-basket profit vs lot 0.01 | Apply or check |
|---|---|---|---|---|---|---|
| 7 | 0.15 | 19.05 | $61.52 | $11.70 | ×15 | Check on real ticks → |
| 8 | 0.07 | 17.85 | $66.95 | $13.65 | ×7 | Check on real ticks → |
| 9 | 0.04 | 20.44 | $61.77 | $15.60 | ×4 | Check on real ticks → |
| 10 | 0.02 | 20.46 | $63.66 | $17.55 | ×2 | Check on real ticks → |
| 11 | 0.01 | 20.47 | $65.58 | $19.50 | ×1 | Check on real ticks → |
| 12 | Even lot 0.01 does not withstand it: it needs a balance of $1 693. | |||||
Equal tonnage means roughly equal risk for the full basket: with the default settings, 11 orders of 0.01 and 10 orders of 0.02 both carry about 20.5 lots. Fewer orders with a bigger start lot means the grid stops adding sooner: after the last order the move goes on without new orders, and the basket needs a bigger pullback to close. A basket that closes after its first orders earns in proportion to the start lot. This is arithmetic of the settings, not a forecast: check the shape on real ticks in the emulator.
Check these settings on real ticksIn the Midas Grid emulator — any gold day since January 2025 tick by tick, and settings run day by day. Free, in the browser.
Formulas and worked example
With the Midas defaults on a $1,000 cent account (×2, $1.95 step, 11 orders, 1:2000, stop-out 40%), a 0.01 start lot survives a move of about $65.6 against the first order and 0.02 only about $41.2, so 0.01 is the largest start lot for a $60 move.
Reviewed
Frequently asked questions
How do I choose the start lot of a martingale?
Enter your balance, the number of orders, the step and the move you want to withstand, pick “Start lot”, and the calculator returns the biggest lot that passes the arithmetic. Example: a $1 000 balance, 11 orders, ×2, a step of $1.95 and a move of $60 give lot 0.01; the balance such a move needs at 0.01 is $885.81. It is a worked example, not a forecast.
How many orders can a deposit hold?
Pick “Orders”: the calculator finds the biggest number of orders that still withstands the move. If the move ends before the ladder does, any number up to 20 passes and the calculator tells you which order the price actually reaches.
What does “withstand a move” mean?
The price goes the chosen number of dollars against the first order, every order of the ladder that lies inside that move opens, and the balance must stay above the stop-out level. The broker must also be able to open each of those orders: the margin level at the moment of opening is at least 100%.
Is this a recommendation?
No. The answer is the arithmetic of your settings for the chosen move. It does not say how likely that move is, and it ignores swap, commission, slippage and gaps.
About this calculator
Choose what to find, enter the price move you want the basket to withstand and the other settings. The calculator searches the arithmetic of the grid on a cent account and shows the nearest alternatives. It works out your numbers; it is not advice.
Formulas and worked example
In short: what start lot can a deposit carry for a given move?
The largest start lot is the biggest one whose floating loss plus stop-out reserve, after price moves the chosen distance against the first order, still fits the balance. With the Midas defaults (11 orders, ×2, $1.95 step, gold $4 000) a $40 move needs $475.71 at lot 0.01, so $1 000 carries a start lot of 0.02. It is arithmetic of the settings, not advice.
need(X) = loss(X) + SO × margin(X) ≤ balanceX is the move against the first order in dollars; only orders whose level lies inside X are open. The broker must also be able to open each of them (margin level at least 100% at that moment).loss(X) = Σ lotᵢ × (X − levelᵢ)With ×2 every lot is the start lot times 1, 2, 4, 8…, so the balance needed grows in proportion to the start lot.
Worked example: $50 balance, $40 move
Cent account, 5 orders, ×2, step $2, leverage 1:2000, stop-out 40%, gold $4 000. At a $40 move all 5 orders (0, $2, $4, $6, $8 below the first) are open: 0.31 lots for a 0.01 start.
| Loss at $40, start lot 0.01 | 0.01 × 40 + 0.02 × 38 + 0.04 × 36 + 0.08 × 34 + 0.16 × 32 = $10.44 |
| Stop-out reserve (margin of 1.00 lot = $2) | 0.4 × (0.31 × 2) = $0.248 |
| Balance needed, lot 0.01 | 10.44 + 0.248 = $10.688 |
| Largest start lot | 50 ÷ 10.688 = 4.68 → 0.04 |
| Check: lot 0.04 and 0.05 | 4 × 10.688 = $42.75 ≤ $50; 5 × 10.688 = $53.44 > $50 |
Move, balance and start lot
Past the last order every extra dollar of move is lost on all open lots, so the balance grows by total lots × move: with 11 orders each extra $10 needs 20.47 × 10 = $204.70 more at lot 0.01.
| Move against the first order | Balance needed, lot 0.01 | Largest start lot for $1 000 |
|---|---|---|
| $20 | $80.64 | 0.12 |
| $30 | $271.01 | 0.03 |
| $40 | $475.71 | 0.02 |
| $50 | $680.41 | 0.01 |
| $70 | $1 089.81 | — |
At $20 the limit is the broker’s check that the 11th order can still open (margin level at least 100%), not stop-out. “—”: even 0.01 needs more than $1 000. The table does not say how likely any move is.
Share this scenario
Midas runs the same calculation in its panel on the MT5 chart.The Grid tab shows the room to stop-out for your account and settings.