How do prop firms handle martingale and grid strategies?

Question

Accepted Answer

Many firms restrict martingale and grid strategies because they increase position size after losses or add positions without stops, producing smooth equity until a sudden large loss. Restrictions usually come through rules on lot size, open positions, risk per trade and mandatory stop losses rather than a vague ban.
Rule-based controls:
Maximum open positions: limits grids.
Maximum total open lots: limits doubling up.
Maximum risk per trade: loss at the stop loss capped as a share of balance.
Mandatory stop loss: every order must carry one.
These are clearer and easier to enforce than a strategy ban, because the platform can apply them automatically.
PropExecutor includes all four in its catalogue: max open positions, max total open lots, max risk per trade and mandatory stop loss, each refusing the order (or flagging it) rather than leaving a judgement for later.
### Example of the risk
A martingale trader doubles position size after every loss. Five losses in a row turn a 0.1-lot start into a 3.2-lot position, and the sixth loss can breach the account in one move. A maximum lot size or risk-per-trade rule stops the sequence long before it becomes dangerous.
### Explain it
Traders accept these limits more readily when the rules page explains the risk they address.

How do prop firms handle martingale and grid strategies?

Detailed answer

Example of the risk

Explain it

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