# Virtual PNL Delay

Flash's margining system adds a virtual PnL delay to positions closed within 30 seconds for [Pool 1](https://docs.flash.trade/flash-trade/flash-trade-protocol/technical-architecture/pages/fgSu9Ca8Kw9FLqPQWUKb#flp.1) & [Pool 2](https://docs.flash.trade/flash-trade/flash-trade-protocol/technical-architecture/pages/fgSu9Ca8Kw9FLqPQWUKb#flp.2), all other pools are set to 45 seconds. This means that for all positions closed before 30 seconds for [Pool 1](https://docs.flash.trade/flash-trade/flash-trade-protocol/technical-architecture/pages/fgSu9Ca8Kw9FLqPQWUKb#flp.1) & [Pool 2](https://docs.flash.trade/flash-trade/flash-trade-protocol/technical-architecture/pages/fgSu9Ca8Kw9FLqPQWUKb#flp.2), all other pools are set to 45 seconds, positive PnL won't be realized while negative PnL will be realized. This system was added to protect Flash's liquidity pool from potential MeV attacks and the system was later extended to protect against oracle delay since Pyth's new pull oracle system (Pyth docs [here](https://docs.pyth.network/price-feeds/pull-updates))


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