Nano Resist: Nano resist is a “broken” skill. No one knows if it works or not. I would suggest not bothering with this skill until you get to a higher level when it actually “works”.
Run Speed: Run speed is moderately important, but you can usually find a fixer to buff your speed Anarchy Credits.
Trade and Repair
Most traders don’t worry about tradeskills until around level 100+ when you get a lot of spare IP. Though one you should always raise is Computer lit. Refer to the tradeskills guide for more info on tradeskills.
Nano and Aiding
Traders rely on a wide variety of nano skills. But Psycho Modi and Time and Space are the most important skills AO Credits. These determine how well you can drain. Sense Imp is also a very useful skill, this is the skill used for calms. I would raise MC once you can use the grid nano. I wouldn’t bother with Matter met since all of those buffs using MM are virtually useless. Also be sure to raise your treatment skill so you can use better nano/hp chargers and get in higher implants. Also if you intend to solo or PvP, raising first aid would be a wise choice so you can heal/recharge nano mid-fight.
Weapons
Obviously, the best choice for a trader’s weapon is a shotgun. There are a lot of great shotguns. I will give you a few guns to keep an eye out for.
Ithaca Ki-8 Ithaca is a quick firing, crit reliant gun. They are one of the most favored trader guns. Try to get a crit scope for maximum results.
Vektor Shotgun Vektors are wonderful low level guns. They are easy to get and hit hard.
Home Defenders Home Defenders are also great guns. Virtually the same thing as a vektor, but with a higher crit.
Manex Catastrophe Manex’s are a devastating gun. Though not recommended until later levels, they sure pack a heavy punch.
So at lower levels try to use single skill shotguns like vektors or home defenders AO Credits. Once you get some IP to play around with start looking at other guns such as an Ithaca or a Manex.
A bit of the old this and that.
Since most traders max intel/psy/agility a common choice for armor would be carbonum (str/agil) and cyber (intel/psy). If you are not a solitus, use the armor that is your green ability. Another option a trader has in the trader only armor called Barter Armor.
