Limit orders and spread

Hi,
could somebody please explain how spread effects limit orders.
For example I have a sell limit order for 1.5000 and spread is 5 will the order get fulfilled when the price is 1.4995 because of the spread?

Also effect of spread on stop losses?
For stop losses let us say my stop loss is 1.9000 and spread is 5 for a sell order will my stop loss get triggered at 1.8995?


Thanks for your help.

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