Although i agree SB has its advantages but here is a summary of the main disadvantages :
SB : Dealer intervention DMA : no dealer intervention
SB : conflict of interest DMA : no conflict of interest
SB : you trade with a single market maker DMA : you trade with multiple marketmakers and with other traders .
SB : your market maker has full control over your orders DMA : nobody control your orders , nobody knows who you are .
'Dealer intervention': What do you mean by this - if you mean they move the market to take your stop, that's rubbish. I make an average of 20 trades per day and regularly win after the price coming within 0.0001-5 of my stop being hit.
'conflict of interest': I doubt they look at each individual's trade (impossible?), they can surely only look at their aggregated position and protect themselves against loss, and with most losing (due to their own shortcomings) I doubt they would even need to have a conflict of interest.
'you trade with a single market maker' - again, I doubt very much they are looking at each trade individually, individual traders/trades really aren't that important within the big picture.
'your market maker has full control over your orders': now you're sounding neurotic! LOL
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