I am wondering if technical analysis is really working for Monero and crypto coins in common. Actually, trading with technical signals are only working because there are many people which follow such rules. Are there so much people trading cryptos that this could work?

12h bullish divergence. I'd say Monero at .0019-20 is very good buy for short/medium.
There are MACD bullish divergences regarding the recent 0.00189 low in all the charts between 1 day and 1 hour.