Institutional Trading &
Prop Firm Rules Glossary.

A trailing drawdown is a dynamic risk parameter in prop trading where the maximum loss threshold continuously ratchets upward as an account's equity rises. Unlike a static drawdown, trailing drawdown permanently locks in higher loss floors when open or closed profits increase, narrowing the remaining buffer if profits subsequent to the peak retreat.

End-of-Day (EOD) drawdown is a prop firm risk rule where the maximum loss limit is recalculated solely at the official market close (typically 4:45 PM or 5:00 PM EST) based on realized account balance. Intra-session spikes in open, unrealized profit do not move or tighten the drawdown floor during active trading.

Intraday trailing drawdown is a strict prop trading liquidation model where the allowable loss boundary follows the highest open unrealized equity tick-by-tick in real time. If a position's floating profit retraces further than the allowed drawdown distance, the account fails immediately, even if the trade is still in net profit.

A consistency rule is a prop firm payout stipulation requiring that no single trading day accounts for more than a specific percentage (commonly 30%, 40%, or 50%) of your total accumulated profits. Its purpose is to filter out lucky windfall gambles and confirm sustainable, repeatable risk sizing.

The Sharpe ratio measures the risk-adjusted return of a trading portfolio or strategy by dividing its excess returns above the risk-free rate by the standard deviation of its returns. A Sharpe ratio above 1.5 indicates an institutional-grade strategy capable of consistent alpha without excessive drawdown volatility.

Profit factor is the mathematical ratio of gross trading profits divided by gross trading losses over a given trading sample. A profit factor above 1.0 confirms overall profitability, while institutional prop trading benchmarks require a sustainable profit factor between 1.6 and 2.5.

Execution slippage is the price differential between an order's requested quotation and the actual fill price confirmed by the exchange or broker matching engine. Slippage intensifies during macroeconomic news releases, thin market liquidity, or when copying orders through lagging desktop middleware.

Latency arbitrage is an exploitative trading method that capitalizes on millisecond price feed delays between different broker liquidity pools or pricing feeds. Prop trading firms universally ban latency arbitrage, using automated order auditing to detect sub-second quote picking and immediately disqualifying accounts.

A multi-account trade copier is software infrastructure that mirrors trade executions from a Leader (Master) account to multiple Follower accounts simultaneously. Modern cloud and hybrid copiers replicate orders in ~15–35ms across separate broker logins without requiring a Windows VPS.

Named Pipe IPC is a high-speed operating system memory pipeline enabling two local applications (such as LogToLast's LogToSync desktop bridge and MetaTrader 5) to exchange binary order packets at sub-millisecond local latency without network protocol overhead or commercial VPS IP flags.

TradingView webhook automation is an event-driven integration where custom Pine Script indicator or strategy alerts trigger an instant HTTP POST request with a structured JSON payload to an execution gateway, which validates risk boundaries and routes orders to connected brokers.

A high-water mark (HWM) is the highest peak equity value an account has attained. In prop trading, the high-water mark is the critical anchor from which trailing drawdowns are subtracted, meaning every new equity peak permanently raises your liquidation floor until the lock threshold is reached.

Cross-market symbol mapping is the automated translation of instrument tickers, contract sizes, and execution modes between Forex/CFD brokers (MetaTrader 5) and centralized futures exchanges (Tradovate / NinjaTrader Cloud API), converting CFD lots into equivalent CME E-mini or Micro contracts.

CME Globex futures trade nearly 23 hours a day, 5 days a week, opening Sunday at 6:00 PM EST and closing Friday at 5:00 PM EST, with a mandatory 60-minute daily maintenance halt from 5:00 PM to 6:00 PM EST. Most futures prop firms enforce a strict intraday flat deadline between 4:10 PM and 4:59 PM EST.

A Fair Value Gap (FVG) is a three-candle price delivery imbalance where aggressive institutional order flow moves price so rapidly that candle 1's high and candle 3's low (in a bullish move) do not overlap, leaving a single-sided liquidity void that price frequently revisits to rebalance.

Position sizing is the mathematical calculation of the exact number of contracts or lots to trade so that if your stop-loss is hit, your dollar loss equals a predetermined fraction (5%–8%) of your actual prop firm drawdown buffer—never your fake headline account balance.

The risk-to-reward ratio (R:R) compares the potential dollar loss of a trade (entry to stop-loss) against its targeted dollar gain (entry to take-profit), determining the exact minimum win rate required to achieve positive mathematical expectancy.

A futures tick value is the minimum price increment (tick size) a CME futures contract can move multiplied by its contract point value. Micro E-mini contracts (MNQ, MES, MGC, MCL) are sized at exactly 1/10th the tick and point value of standard E-mini contracts.

Trading expectancy (Expected Value or EV) is the statistical average dollar or R-multiple amount a trader can expect to make or lose per trade over a large sample size, combining win probability, average win size, loss probability, and average loss size into a single edge metric.

The Sortino ratio is a modification of the Sharpe ratio that evaluates risk-adjusted returns by dividing excess portfolio return solely by downside deviation, avoiding any mathematical penalty for positive upside volatility spikes.

Developed by Dr. Van Tharp, the System Quality Number (SQN) measures the statistical reliability of a trading strategy by multiplying the ratio of mean R-multiple expectancy to R-multiple standard deviation by the square root of the number of trades (capped at N = 100).

A prop firm buffer zone (or safety threshold reserve) is a mandatory profit cushion—typically equal to the account's initial maximum drawdown plus $100—that a funded trader must accumulate and leave untouched in the account before withdrawing 100% of subsequent profits.

A Daily Loss Limit (DLL) is the maximum dollar or percentage loss an account may incur within a single trading session (including open floating losses and commissions). Depending on the prop firm, hitting the daily limit triggers either a Soft Breach (session pause) or a Hard Breach (permanent termination).

On-Submit replication mirrors resting limit and stop orders to follower accounts the exact millisecond they are placed on the master account, whereas On-Fill (Entry/Exit Market Sync) waits until the master executes before dispatching instant market orders to follower accounts.

The Pattern Day Trader (PDT) rule is a FINRA regulation requiring US equity and options traders to maintain at least $25,000 in margin equity to execute four or more day trades within five business days. CME futures and prop firm accounts are 100% exempt from FINRA's PDT rule.