hi I am new here..So I am start a trading in different market place.. can you give some tips about trading.now which exchanger is best for trading?
unfortunately there is no simple answer to which exchange is the best. most of them are good enough for trading but sometimes they differ on some aspects that makes one better than the other but which aspect you are looking for can be different from person to person.
one the things most traders look for is trading fees. for example poloniex has lower fees (I think it is 0.1-0.15%) but bittrex has higher fees 0.25%
another thing is their support: for example again poloniex has terrible support but bittrex has a better one (not the best but it is better).
sometimes the withdrawal fees are also an issue, but mostly in exchanges that work with fiat because fiat withdrawals are the most expensive.
some people also care about the interface of the exchange. check them out yourself to see if you like the charts, the books,...
in the end I suggest finding a couple of exchanges like the top 10 and check each one out, read their ToS, their verification process, read some feedback on them and see their fees,... if you liked them then sign up.