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True, that is why most people are using bot to ease their trading. Doing trade manually will only get yourself burnt especially if you are doing it in a high volume market where the margin of buy and sell are almost none and not to mention that human's speed is limited, price may shoot up immediately without you knowing , i.e few weeks back someone mistyped a zero on btc-e and executed a 10k BTC buy, shooting the price straightforward.
Another options will be trading in a non fee exchanger , most chinnese exchanger applied a zero fee market though.
True, that is why most people are using bot to ease their trading. Doing trade manually will only get yourself burnt especially if you are doing it in a high volume market where the margin of buy and sell are almost none and not to mention that human's speed is limited, price may shoot up immediately without you knowing , i.e few weeks back someone mistyped a zero on btc-e and executed a 10k BTC buy, shooting the price straightforward.
Another options will be trading in a non fee exchanger , most chinnese exchanger applied a zero fee market though.
I was simulatiing some bot trading, but even that didn't go fully according to maths.Even if my bot tries to sell some coins, the pure fact of selling creates a downwards shift in prices.
Indeed, having bot does not mean thay you will always get profit though, it basically ease you in trading (bolded it). In some situation, trading with bot is much easier though especially in high volume market.
@ News' influence on BTC price: What I see is that it has a temporary effect 
Slight variation because of people thinking what it will bring, then it goes up/down (back) where it (roughly) was. Of course major news have different impact.
Slight variation because of people thinking what it will bring, then it goes up/down (back) where it (roughly) was. Of course major news have different impact.As a matter of fact, this is actually needed for daily trader. Having either good or bad news will bring on the hyping even more active , which you can check from btc-e trollbox regarding how they react due to the KNCminer coins being moved.
Also if you remember correctly on how the news of several months ago regarding paypal accepting BTC is leaked, people are buying like crazy but somewhat the price is going back to where it was weeks later. News do have slight effect for the price but the thing is due to the market being manipulated, we could not even predict wether the X or Y news will bring an impact or no the market
i dont buy direct from exchanges i buy for a resseler that plays with market soo lets say the btc worth around 300 dollars that users charges me 50 dollars above and done...even if he bought btc low or high the user just got some income and always add a rate above the current rate of btc on that day .I dont buy direct because most exchanges ask too many details about the trader and allow wire transfers as credit card and i dont like it.