Come on, Leo, just be serious...

There are various approaches to station trading. You don't have to focus on just 1 item . As a station trader you can profit on playermade items as well as on NPC seedded/dropped ones using various strategies. Trading is more about finding a 'hole' in the markets rather than eliminating all other traders. Its constant and neverending process of optimalization and adaptation to constantly changing conditions rather than just "focus 6 months on 1 item and dominate".

Or you could do it in a way that doesn't limit your profit to the number of trades on a single item.

Search the market for any item that sells for a higher price than people are buying, place a buy order, then resell it with a sell order when you get a few of them. You make wahtever the margin is from buy to sell and you can do it on as many items as you can stand (or are limited by your total number of open market orders).

Also your strategy can be beat by someone doing the above since there would have to still be some margin, and a smaller margin is acceptable to someone who is trading on 100 items instead of your 1 item. (assuming you were serious which I doubt.)

how can I handle 100 items when I have 10 min/ day to manage my trading stuff and I need 1 billion isk per month?

Or even 100b in 15 weeks

Time in game is obviously a factor. But other equally important points are logistics, reinvestment, research and logistics logistics logistics.

Most time consuming part for me is time necessary to take actions based on decisions supported by computer-refined data. It's 2012 - you can use machines&3rd party tools to gather/analyze market data. It's hard to tell if it will guarantee you 1B/month but i found what suits to me and belive it or not - it works and it's fun. (long story short: i started as a hauler, after couple of weeks moved to Jita , 300 orders changed 2x-3x/day, burned out after 14 days...). It is possible to not-babysit orders and still make decent profit...

I completely disagree.

I'm doing station trading in jita.
so I don't need anything else than the market and trading methods to get money from the market.

market=jita only

I really don't understand why you are repeating logistic so much
I never leave the station in jita

https://forums.eveonline.com/default.aspx?g=posts&m=1271117#post1271117

https://forums.eveonline.com/default.aspx?g=posts&m=1271110#post1271110

your comments on both of these posts show me that you're either a troll or just refuse to accept any information given to you by people who are obviously more experienced than you.

If you only have 10 minutes a day, you can handle 30 items with ease. I did it when i started.
you don't need to update all of them all the time, and frankly in jita if you update ONCE A DAY, you get outbid within around.. hmm, 10-20 minutes. leaving 22 out of the 23 game hours pretty much dead to you.

you actually have a higher chacne of making isk playing 10 times a day for 1 minute at a time. update the single item you have and get out.

But if you want to invest in one single item, without hauling, without worrying about logistics, without undocking.
Go for it. When the bubble crashs around you and you lose all your precious iskies make sure to post here.
Case in point people who were invested heavily and only in meta 4 items took a serious hit the last couple of weeks.

But what do we know, You want to talk to a serious jita trader and not a bunch of people who don't know anything they're talking about.

You probably can't make 1b isk per month in 10 min per day. It doesn't matter what you are trading, everyone would start to do it as well because of the profit and then the margins would sink. (I'm not saying it can't be done, but it wouldn't be easy)

you don't need this kind of information.
it is useless and waste of time for me.

BUY, SELL, VOLUME and STRATEGY

that's it.

If you only have 10 minutes a day, you can handle 30 items with ease. I did it when i started.
you don't need to update all of them all the time, and frankly in jita if you update ONCE A DAY, you get outbid within around.. hmm, 10-20 minutes. leaving 22 out of the 23 game hours pretty much dead to you.

I'm running this game since 4 years
I know exactly what I'm doing.

4 Years and you only make 1b /month?

leocaldari's name rings a bell.

I did some trading in 2009/2010 that mostly centered around taking advantage of other people's market manipulations in Jita and if I'm not completely mistaken I ran across this character more than once.

Diversification, mate. It's not about the isk, it's about the risk!