Trade too much
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The trading volume is too large
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Know too many methods
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I like your information and this three are all the most common problems of a trader. At some point we don't know how different traders use this but they are able to gain profit.
Trading to much is not good but for some traders who master their own techniques will trade too much but will exit after lossing some small amounts.
Trading too much volume
This is a high risk, high reward of course it need to be calculated and all trade plans should be followed or adjusted within the market. Many high volume traders manage to earn.
Knowing many methods
It is good if we know and learn to apply every single method in a profitable manner or with a strong strategy that we can used.
Actually these three things can be something positive if we use it well right? Who says, having lots of strategies is a bad thing? but if you focus too much with many methods it will certainly make you dizzy right? The point is you have to be wise in using the methods and strategies that you master.
Then too much volume can also be a positive thing because you can make profits quickly because the market is crowded. And too much trading is also positive because it provides a large profit to you, all of that have positive and negative effects.