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Hi XXX,
 
We're happy to hear from you and hope we provide you with some information and clarity regarding your questions, so you feel confident trading with Fusion. 
 
We have a mix of liquidity providers for a host of symbols that are used based on a number of factors such as the competitiveness of prices and spreads.
 
We want to bring to your attention to the concept of market depth when trading larger volumes on a symbol. A large order will be unlikely to fill at the top-of-book price on the retail price feed. It is the top-of-book price that appears on the MT5 charts. There is a certain volume of liquidity available at this top-of-book price, which is usually around 0.5-1 lots for FX and metals.  
 
If you are looking to trade larger lot sizes, we do offer an institutional price feed. There is a larger top-of-book volume available with the same low commissions that we are known for, but the spreads are naturally a little wider to account for the deeper liquidity. This feed in general may provide less slippage from the quoted top-of-book price and may give you more certainty of the executed price you will receive on your trade when you enter and exit the market, and you will not need to open as many small orders to try and fill the same volume. Essentially, on the institutional price feed, there is greater top-of-book liquidity/market depth, which is stretched to around 5 lots for FX and metals.
 
We understand you have a concern with the commission prices. We wanted to let you know that our system rounds up to 2 decimal places. This system feature is used not only for commission pricing but to display other account figures such as PnL and balance.

We hope to continue serving you as a client so if you have any further questions or concerns, please don't hesitate to reach out.