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               | Dealing Desk (DD) |  | No Dealing Desk (NDD) |  | 
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                  | Instant Execution is a feature of a Dealing Desk broker |  | Market Execution is offered by No Dealling Desk brokers |  | 
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               | Price quotes come from Broker |  | Price quotes originate in the Market |  | 
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                  | Forex Broker acts as a Marker Marker and "makes market" by creating own prices |  | Forex Broker receives prices from Liquidity Providers |  | 
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               | Order filled at the exact price requested |  | Order filled at the current market price |  | 
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                  | If an order cannot be filled at the exact requested price, it's cancelled |  | If order cannot be filled at requested price, it gets filled at the next available price |  | 
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               | Price cannot improve |  | Price can improve |  | 
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                  | Order either filled or killed (FoK order type) |  | Price can improve in trader's favor, as well as become less attractive |  | 
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               | Spreads are usually higher |  | Spreads are tight |  | 
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                  | Dealing desk brokers are known to charge higher spreads |  | Spreads with a No dealing desk broker starts as low as 0 pips |  | 
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               | Fixed spread |  | Floating spread |  | 
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                  | Instant execution comes with fixed spreads |  | Market execution always comes with floating spreads |  | 
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               | No commission |  | Possible commission |  | 
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                  | Dealing desk brokers don't charge commission |  | With DMA & ECN brokers - commission applies. STP brokers might not charge commission
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                  | Requotes are common, more so during volatile/fast moving markets |  | Requotes are eliminated, since orders can always be filled at next available price  |  | 
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                  | Slippage not possible. Some brokers might allow setting "price deviation" to accept minor shifts in price |  | Slippage is normal part of trading with Market Execution. Slippage occurs every time price shifts from originally requested. Slippage can be in trader's favor, as well as against |  | 
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               | Stops & Profit levels can be set in advance |  | Stops & Profit levels cannot be set in advance |  | 
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                  | Instant execution allows setting Stop Loss and Take Profit orders prior to placing a trade |  | Stop loss and Take profit orders cannot be set prior to order placement, only after a trade is open |  | 
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               | Execution is not guaranteed |  | Execution is guaranteed |  | 
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                  | Execution depends on brokers' ability to accept & counter-trade position |  | Execution depends on liquidity providers, where liquidity is often plenty |  | 
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               | Option to refuse new price quote |  | Automatic fill on all orders |  | 
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                  | If price is re-quoted, traders can refuse the new price |  | Orders filled automatically at current available market price |  | 
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               | Slower execution speed |  | Fast execution speed |  | 
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                  | Order execution takes few seconds |  | Order execution done in fractions of seconds |  | 
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               | Restrictions on trading styles |  | Unrestricted trading |  | 
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                  | Possible restrictions on trading styles: scalping, certain EAs, news trading etc |  | No limits on trading styles, as a rule (double-check with your broker) |  | 
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