Quick answer: Control a trading bot's risk with four settings: a small lot size, a maximum drawdown where new positions stop, an equity floor you won't go below, and session hours that keep it out of times you don't want it trading. Set them before the EA runs, not after a loss.
Key takeaways
- Lot size is the most important risk input.
- A drawdown limit stops new positions after a set fall from the peak.
- An equity floor is a hard dollar line for the account.
- Session hours reduce exposure to thin or news-heavy periods.
- Limits stop new trades; they don't guarantee a maximum loss.
Why risk settings matter more than the strategy
Two people can run the same trading bot and get very different outcomes because one uses a lot size ten times larger. Before thinking about returns, decide how much you are willing to lose.
1. Lot size
Lot size sets how much each position moves your account. While testing, use the minimum your broker allows, often 0.01. Increase only after weeks of results you understand.
2. Maximum drawdown
Drawdown is the fall from the account's peak. A max drawdown input tells the EA to stop opening new positions once the account falls that far. Choose a level you could accept emotionally and financially.
3. Equity floor
An equity floor is a dollar amount the account shouldn't go below. When equity reaches it, the EA stops trading. It is useful as a last line of defense.
4. Session hours
Restricting when the EA can open positions reduces exposure to illiquid hours or major news. Learn more in trading sessions for EAs.
5. Direction
Allowing buys only, sells only or both is another way to limit exposure when you have a view you want the EA to respect.
The limitation you must understand
These limits stop new positions. Open positions still follow their exit rules. In fast markets or weekend gaps, price can move past a limit before anything closes. Limits reduce risk; they don't remove it.
A simple starting framework
- Decide the maximum amount you can lose without affecting your life.
- Set the equity floor above that line.
- Pick a drawdown limit that triggers well before the floor.
- Use the minimum lot size on demo, then on live.
- Review weekly using the Experts log and account history.
Remix Ai was built around these exact inputs: lot size, session hours, max drawdown, equity floor and direction.
Frequently asked questions
What is a good max drawdown for a trading bot?
There is no universal number. Choose a level you can accept, and remember real drawdowns can exceed backtests.
Does a drawdown limit close my open trades?
Usually it stops new positions. Check the EA's documentation to see how it treats open positions.
What lot size should I start with?
The smallest your broker allows, especially while testing.
Can risk settings prevent all losses?
No. They reduce exposure but cannot prevent losses from gaps, slippage or strategy failure.
Want to see an EA built around limits you control? Remix Ai is an Expert Advisor for MetaTrader 5 with lot size, session hours, drawdown and equity limits. Launch price $199, one-time payment.
Risk disclosure: this article is for education only and is not financial advice. Trading with automated software carries a high risk of loss, and past or simulated results do not predict future results. Remix Ai sells software. We do not manage accounts, offer copy trading or sell trading signals.