NANO surprised us with a 5x in a matter of 5 days, going from $1 to $5.
The Fib extension shows us we are at the 361.8 resistance which coincides with the weekly resistance line (if you check an exchange with a longer history).
If for some reason we do not stop here (which we may very well not, considering BTC is pumping without a sweat), the next weekly resistance is at $10 with little to stop the price reaching that level. Mind you, goin from $5 to $10 is only a doubling in price now.
I recommend being cautious about longing at this moment. Wait for the $5 resistance line to be broken and retested as support for a safer long (check lower time frames for that). If we break the support line (which we will at some point) then we will turn bearish for medium term.