# Why a MetaTrader report and a Forge test differ

The same rules, tested in MetaTrader and in Forge, rarely give the same numbers at first. Each cause below is one the engine names.

## Spread

MT5's tester uses the spread set in the tester or recorded in its history; a Forge run uses the spread in its own data or broker facts, so entries and exits land at different prices.

## Server time offset

The report's times are the broker's server time and Forge's are UTC, so every time differs by the same offset.

## Daylight saving

The broker's offset changes by an hour twice a year, so times differ by one more hour for part of the year only.

## Swap

Both testers charge today's swap rate on past nights, and Forge books no credit, so trades held overnight end differently.

## Price detail

MT5 may replay real ticks, generated ticks or open prices only, while Forge fills on its data's bars or minutes, so a stop and a target inside one bar can resolve differently.

## Fill rules

Which price a pending order or a stop fills at, and which of a stop and a target fills first in one bar, follow each tester's own rule.

## Commission

The report uses the account's commission, and a Forge run uses the commission set for it.