Dear Traders,    
You are very welcome to try your extreme and news scalping EA's and manual scalping at https://tier1fx.bm (https://tier1fx.bm/)  
For all of your questions the answer is: Yes Tier1Fx allows full freedom for any kind of scalping methods.    
100% STP,DMA,ECN, Spreads from 0.1 and lowest in market in News Volatility Market, 0 Slippage from the broker, 
no dealing interventions, no requotes and fair commission cost (2.5 USD per side for 1 standard lot)   
Simply, the conditions are 100% same as for the Big Institutional Traders.   
Please do not hesitate to ask, replay and communicate with me in this topic.    
Honest wishes for Profits.    
Tier1FX