In an early episode, Oliver is said to be carrying a loadout of 24 arrows. Beyond the standard arrow, we've also seen (not inclusive, just off the top of my head):
- Computer hacking arrows
- Bug/listening device arrows
- Net/bolo arrows
- Explosive arrows
- Nano-particle tracer arrows
- Poison/cure arrows
In Streets of Fire (S02E21), Oliver asks another person to find the explosive arrow in his quiver after he had been separated from it, meaning that at least some of the special utility arrows are not kept separate on his body/armor.
Given how quickly he often fires the arrows at enemies, how is he able to correctly identify which arrow he has pulled from the quiver?