1.Regulation
There are two first-class regulatory bodies in the world: FCA UK & ASIC Australia; brokers regulated by them are usually more trustworthy. So, your next forex broker should be regulated by at least one of them.
2.Spread
Spread is a transaction fee you pay to the broker every time you trade & you said your last broker charged spreads as high as 1.6 pips which is too high. If I were you I would go for a broker with spreads from 0.6 pips. When the spread is too wide, it takes your trade a longer time to become profitable.
3.TradingView Platform
Find a broker that unconditionally offers TradingView as part of their platforms. TradingView has the best tools for analyzing the market, so it will make your technical analysis easier, precise & save you precious time.