Everything you need to know about prop firms

[LondonScalper]

The comparison I wish existed before I bought my first challenge

Plain-English firm notes are more useful than glossy comparison tables — agreed.

What I would add from a risk seat: read the daily loss and trailing/static DD as trading constraints, not as marketing. A 5% daily and 10% max sounds similar across brands until you ask whether equity or balance is used, whether open P&L counts, and how news/EA rules are enforced. Those details decide whether your normal London scalp style even fits.

Also price the fee as a cost of education/evaluation, not as prepaid profit. Challenge math only works if your process already survives your own 1% risk rules; the firm’s rulebook should be an overlay, not the strategy.

Useful thread if you keep columns for: DD calculation method, news policy, min days, and payout friction — not only split percentages.

Which constraint surprised you most on your first challenge — daily loss, consistency rule, or news ban?

[PropScalpDesk]

Compare rulebooks, not Instagram payouts

Firm-by-firm fee and split tables are useful. The part that decides whether a scalper survives is usually smaller print: trailing versus static drawdown, consistency, news, EA policy, weekend holding, and how support interprets “around news.”

My pre-purchase checklist from a full-time Frankfurt seat:

• Can I trade my actual session without living inside blackout windows?
• Does trailing drawdown start from balance, equity, or high-water — and when does it update?
• Is there a best-day profit cap that punishes one clean open?
• Payout rhythm and minimum — discipline after funding matters as much as the pass itself.

I ignore scaling-plan fantasy percentages until I have one real withdrawal. Marketing is not a track record, and a cheap challenge fee is expensive if the rules fight your session.

I also skim payout processing time and any rule that changes after you scale. A firm that is fine at fifty thousand can become awkward at the next tier if consistency or news language tightens. Read the scaled account FAQ with the same care as the challenge FAQ.

If you have traded more than one firm: which single rule difference changed your size or session most — daily loss, trailing drawdown, or news?

[Shadow Trader]

Latency arbitrage means taking advantage of delays between price feeds, buying on a fast feed what a slower one hasn't yet repriced. Brokers and prop firms dislike it because the counterparty always loses.

The ban often arrives as a vague clause about "abusive trading" or "exploiting feed delays." A legitimate fast scalper can fall under it without meaning to.

Typical flags include very short holding times, a high win rate on very small targets, trades clustered right at news or at price spikes, and execution patterns that always seem to beat the quoted price.

What makes it tricky is that honest high-frequency scalping can look the same from the outside. A fast strategy on a good connection will show many of those markers.

Reading the terms for specific thresholds, such as minimum holding times, helps. Some firms publish a number, like 30 or 60 seconds, and some don't.

If a fast strategy sits close to the line, getting clarity in writing before depositing is worth the delay. The alternative is a closed account and a withheld payout over a rule that was never quite specified.

Has a prop firm ever flagged a legitimate strategy as latency arbitrage, and how was it resolved?

[Fairman]

Pricing the fee as an evaluation cost and not prepaid profit is the right mindset. Say a 100,000 dollar challenge costs 500 dollars and my pass rate is 1 in 4. The real cost of one funded account is about 2,000 dollars in fees, before any payout, so I'd want the expected first payout to cover that comfortably.

The columns you list are better than split percentages. Equity versus balance for the drawdown matters because an open trade that floats 1.5 percent against me counts on one and not the other. I'd also note whether the daily loss resets at a fixed server time, since a trade held across that moment can break the limit before I've even looked.

Your rulebook-as-overlay point is the one I'd stress. If I'm risking 0.5 percent and the firm's daily limit is 5 percent, then my own rules never get near it, and that's a comfortable position. If I scrape through only by risking 2 percent a trade, then it's the firm's rules running my strategy.

For your question, the thing that surprised me most was the news restriction. My EA entries around releases were fine under my own rules but would have been flagged by theirs, so I had to read the exact window, ahead and after the release.

Do you track which firms enforce the news rule strictly in practice, or only by what's written? And has any firm's payout friction changed your choice after the fact?