That depends on what you trade and which software, I think. ES on NT8 is fairly realistic as far as I can tell. Including slippage.
Market makers make monies on the bid and ask spread so, they would take every opportunity to keep it as wide as possible since, they take both sides of any trade. Options traders should be very aware when they buy or sell options. Options can have very wide bid and ask spreads especially, when the market maker is trying to squeeze you into selling or buying at highly unfavorable options prices.
Market makers make trading difficult for retail traders. But they are also responsible for infusing liquidity in the market. It is important to understand how a specific asset is affected when market makers play.
market makers is everywhere and they always make rich by retail traders money. manipulation is their foremost weapon.
How the fuck do market makers deliberately manipulate the market to rinse retail? I still don't understand this.