Skip to content
PipValley
Score your siteBook a call
PipValley
Book a call

hello@pipvalley.com
Based in Exeter - working across prop trading firms worldwide

Glossary · Risk and drawdown

A-book

  • Also called
  • A-booking
  • straight-through processing
  • STP
  • copying to live

What it means

In a prop firm, A-booking means taking a trader's positions, usually from the simulated funded account, and replicating them on a live account with a broker or liquidity provider. The firm's real profit or loss then follows the trader's results, which can offset the performance rewards it pays.

Firms rarely A-book everyone. It costs money (spreads, commissions, platform and bridge fees) and only makes sense for traders with a record of consistent results. Firms that do it typically set criteria and keep the decision internal.

A-booking the firm's own capital does not by itself make the trader's account live; the trader still trades the simulated account unless the firm says otherwise.

Related terms

Read these next.

Risk and drawdown

B-book

B-book describes trades the firm does not pass to a market: in prop firms, simulated trades that stay internal, with payouts funded from the firm's own revenue.
Risk and drawdown

Hybrid model

A hybrid model is a prop firm or broker risk setup that keeps most flow internal (B-book) and routes selected traders or positions to a live market (A-book).
Risk and drawdown

Liquidity provider

A liquidity provider (LP) is a bank, prime broker or non-bank market maker that streams prices and fills orders, which a prop firm or broker connects to for live execution.
Evaluations

Simulated funded account

A simulated funded account is the post-evaluation account a prop firm gives a trader: trades run in a simulated environment and the firm pays performance rewards on results.
Evaluations

Scaling plan

A scaling plan is a prop firm's published path for increasing a trader's simulated allocation, profit split or both after they meet defined performance conditions.

On your website

Where this shows up on a prop firm site.

Feature

Rules pages

Rules a trader can read one way: one page per rule, worked examples from your own numbers, and a table of which rules apply to which plan.
Tool

Drawdown Rule Visualiser

See exactly how static, trailing and end-of-day drawdown rules behave on the same equity curve.
Guide

What Is a B-Book Prop Firm? A-Book, B-Book and Hybrid

What B-book means at a prop firm, how A-book and hybrid models differ, what each costs, and how to describe your model honestly on your site.
Guide

How Do Prop Firms Manage Risk? The Operator's Toolkit

How prop firms manage payout risk: rules tied to account size, withdrawal caps, consistency rules, abuse detection, reserves and selective A-booking.

Looking for a prop firm to trade with, not a website? Compare firms on PropFirmPal, the comparison site our founder owns.Go to PropFirmPal →

All glossary termsGuides

A fixed quote in one day

Your firm, built to look inevitable.

Tell us about your models, platforms and markets. We reply within one business day with a scope and a fixed quote.

Book a callScore your site
Score your siteBuilds from $1,490Book a call