Sorry, I'm not clear here. For example there are EURUSD and 6E futures. Which of them is leading? Which ticker will move first, fx or futures? I'm not sure which market I need to use to trading? There are separate buy/sell volumes in futures market and it's possible to use special types of charts, like MarketDelta/FootPrint or MarketProfile. But as I see currencies futures depend from Fx market, is it correct? And for this reason the analysis of currencies futures is less valuable?
if trading futures, u worry less about slippage. If you are trading fx, banks will take your money thru large slippage
This question has been asked a lot... Interbank spot FX mkt is the one that's dominant. Compared to its liquidity, futures are nothing. Moreover, futures are, by definition, a derivative contract with spot as the underlying.
I would say the contrary... max slippage you have with a standard bucket shop like Oanda is 0.2 - 0.3 pips.