The negative effects that appear can occur because ...
Not bad time management:
I myself feel forex trading can interfere with my work performance, namely the concentration of real world work that should soon be resolved eh instead it is not finished because the thoughts are divided into two, so it is necessary to have a self-discipline for this trade, which is finished first the main job then if it's not there again work again then it continues for trading.
Impact to health:
If the eye becomes minus it is certain, every day we look at the monitor screen, if the problem is minus the eye may be used, but there are more that we will forget to eat and drink, I begin to feel this negative effect because it is often postponing meal hours which of course will have a negative impact on health
that's all that in my opinion is a very fatal negative impact