1. Well, I have only used CEX. I haven't been hacked and the whole platform has never experienced such a thing.
2. Of course, not. It's actually dangerous. Most of my assets are kept on a hardware wallet.
3. RSI.
4. I read current news and search the information.
5. Haven't tried that either.
6. BTC/USD or ALT/USD, but I'm also planning to trade cryptos for EUR (https://cex.io/btc-eur).