Hello, i have find some bug or maybe not, i don't no.. So can you help me.

For exp, if some one put game X on the market with the price 2.0001 keys, and if i put the same game X on the trade for 2 keys, my game is then not visible on the market ? Its this bug or ? I know for the 1% rule, its this because this or ? Because i put the game via trade, and not via market.

Yes you're right, your trade does not show up in market because you are not 1% lower than current best price. Since you are using old trade the 1% rule won't stop you from making the trade (as the trade still work in direct link, there is no reason to stop you from doing so either).

Joto, if the system behaves this way, it will allow someone to (partially) block the appearance of prices *lower* than his offer, by being the first to set a 2.0001 sell order, for instance, to any given game.

The discrete quality of prices on old-style trades (price is a integer number of keys) would mean that the old-style trader would need to sell for 1 key to be featured--in this particular case. The only effect is preventing legitimate offers from being shown to potential buyers. There is no upside to this. (Even though this will affect only people putting up old-style trades; nonetheless it will still prevent some trades from being shown to buyers, thus hampering trading to some degree--because all old-style trades--at 2 keys in that particular example--will be hidden, and only old-style trades more than 1 key lower than the listed price will be shown.)

Overall the 1% rule is completely unjustified; does no good; and has no parallel in similar trading systems (stock, options, commodities, cryptocurrencies).

No buyer has ever complained that store A offers the same product as store B, but at a slightly lower price. Only sellers complain about price reduction and discounts and try to denounce, badmouth, and outlaw it, using fallacious arguments to depict it as harmful, predatory, or illegitimate. The only people complaining about being undercut in the new market system and supporting the introduction of artificial and unnecessary discreteness into the system are those who think that it will prevent prices from falling and hurting their profits.

It makes *even* less sense for completely fungible items as Refined Metal and all other non-game items. (The completely automated nature of the system and the complete equivalence among all instances of the item make it so that the buyer cares not in the least about which one he is buying; only price and amount matter to him; and the system will pile up existing offers at different prices when executing his order.)