How Slippage Works on MyFundedPerps: Tiers Are Ceilings, Not Guarantees
Slippage is the quietest cost in trading, and on most platforms it is also the least predictable. MyFundedPerps slippage works differently: fixed tiers set a maximum fill distance for every market order, and the tier is a ceiling, not a guaranteed charge. If the top of book offers a better price, you fill there and keep the difference. You never pay more than the cap.
This article covers how fills are priced, the full tier tables for every instrument group, and how to size orders so slippage never surprises you. For the rest of the cost picture, see our myfundedperps-fees-breakdown article.
How market orders are filled
Two fill models cover the platform:
- Most markets fill at the top of book, meaning the best bid or ask (Level 1). Buys fill at the best ask; sells fill at the best bid.
- Forex fills at mark price instead, a fair-value reference rather than the book.
Slippage always goes against the order: buys fill slightly above market, sells slightly below. Your order notional determines which cap tier applies, and the cap is the worst case. This is a deliberate change from the previous behavior, where every fill took the full tier regardless of book quality. Now a deep, liquid book means your effective slippage can be a fraction of the cap, or effectively nothing beyond the spread.
Remember that 1 basis point (bp) is 0.01%, so even the largest caps below are measured in hundredths of a percent.
Fixed-tier markets: indices, gold, silver, oil
Six major markets use fixed slippage tiers based purely on order size: NAS100, SP500, GOLD, SILVER, CL, and BRENTOIL.
Forex, which fills at mark price, uses tighter caps on the same size bands: 0.05, 0.08, 0.12, and 0.15 bps respectively.
A worked example from the platform's own education materials: a $150,000 GOLD buy carries a 0.5 bps cap (0.005%). At a gold price of $4,366, that is about $0.22 per ounce above market at worst. If the ask sits closer than the cap, you fill at the ask.
Tiered markets: everything else by open interest
All other instruments, meaning crypto perps and stocks outside the fixed-tier list, are tiered by open interest (OI). The OI band is checked at order placement, then the size tiers apply within that band:
The structure tells you exactly where slippage risk lives: deep markets like BTC barely move the needle (0.8 bps on a sub-$100K order), while a thin low-cap meme perp can legitimately cost 16 bps on a large order. That is still a ceiling, and the top of book can deliver better, but you should budget the worst case on illiquid markets.
Why ceilings matter for strategy design
Predictable worst-case slippage changes how you can plan:
- Cost can be modeled before entry. Unlike live-venue slippage, which is unknowable until the fill, the cap lets you compute the maximum execution cost as a line item alongside commissions and swap fees.
- Order size is a slippage lever. Splitting a $180K order into two sub-$100K orders drops you from the 0.5 bps to the 0.25 bps tier on fixed markets, at the cost of a second commission. On a GOLD order, 0.25 bps saved on $90,000 is about $2.25 per split, so run the comparison before slicing.
- Thin markets punish size disproportionately. On OI-tiered markets, jumping from the sub-$100K to the sub-$500K column can nearly double the cap. Check the OI band before assuming a small-cap perp trades like BTC.
- Caps are not a floor on quality. Because the tier is a ceiling, quiet liquid sessions often fill at or near the top of book. Do not mentally budget full-tier slippage on every trade or you will overestimate costs and undersize.
Slippage interacts with exposure too: large orders must also fit within the shared exposure caps per market (see myfundedperps-exposure-caps coverage on the blog and the live table at myfundedperpetuals.com/exposure-caps; cap and leverage figures are as of launch, September 2026, and may have changed since).
Slippage in the total cost stack
Every trade on MyFundedPerps carries up to four cost components:
On a $100,000 crypto market order held a few hours, commission ($30 per side) plus a realistic slippage fraction of the 0.8 bps cap (up to $8 on high-OI markets) plus swap charges is the honest expected cost. Traders who model only commissions systematically underestimate round trips, which is why the myfundedperps-commissions and myfundedperps-swap-fees explainers on this blog pair naturally with this one.
For market selection across all 130 launch markets, the myfundedperps-markets-guide article is the companion read, and docs.myfundedperpetuals.com carries the authoritative execution documentation. Still evaluating whether to buy? myfundedperps-pricing-plans lists challenge prices, and the PERPS code takes 20% off through the end of September 2026.
Frequently asked questions
What is MyFundedPerps slippage, in one sentence?
It is a tiered cap on how far against you a market order can fill, with order notional (and open interest on most markets) setting the tier, and better top-of-book prices always taking priority over the cap.
Do I always pay the full tier?
No. The tier is a ceiling. If the best bid or ask is closer than the cap, your order fills at that better price. Under the previous behavior every fill took the full tier; that is no longer the case.
Which markets have fixed slippage tiers?
NAS100, SP500, GOLD, SILVER, CL, and BRENTOIL use fixed size-based tiers from 0.25 to 1.00 bps. Forex fills at mark price with caps from 0.05 to 0.15 bps. Everything else is tiered by open interest at order placement.
Does slippage apply to limit orders?
Slippage caps govern market-order execution against the top of book. A resting limit order fills at its limit price or better by construction, though it pays the same commission as any other fill.
Can slippage breach my daily loss limit?
Yes. Slippage worsens your effective entry or exit price, which flows straight into realized P&L. It counts toward the 3% daily loss limit and the static drawdown floor like any other trading outcome.