Indeed. 2 seconds is just too low. Even scalping EAs that trade in such intervals fail, and they are faster than a human.Scalping gives the fruitful result but with in 2 seconds can not give the desirable result and most of the brokers does not allow such kind of order, you should make the scalping with proper planning and should keep open your trade at least 10-15 seconds for better results.
Scalping can be a big headache with retail brokers especially which has bad feed and unstable platform. It may take several tries before you find a broker that fits your scalping needs. Though it doesn't guarantee you'll be offered same quality over time as it may depreciate if broker is a Market-Maker.a half of second and a slippage may take your money awaaay