yes lot size depend on our account balance and i say that we work in market with low lots and we do not use big lots size order in market and beginners must use low lots in market and beginner follow the good trading strategies and beginners work with careful trading methods and beginners always understand the market risk management and work in market with experience then beginners make good earning in forex market
High impact news are good and easy to trade as using these we can determine which way to trade in the market and as the trend remains at least for few days directed by that news it give easy money making opportunity but we should be careful for those news which are incorporated or discounted in prices in few moments. Also when a news is to be announced usually market make good movement guessing the news and when news is not upto expectation it returns back so we should avoid trading few hours before such major news is to be announced.