where online can you cash out large amounts of bitcoins and also buy large

[talkin2traders]

I am new to the bitcoin trading but i want to be able to trade my bitcoins on the highs and buy on the lows but i cant seem to find any online services that do this. How do the so called (whales) do it or normal traders?
help needed please

[betudontbet]

I am new to the bitcoin trading but i want to be able to trade my bitcoins on the highs and buy on the lows but i cant seem to find any online services that do this. How do the so called (whales) do it or normal traders?
help needed please

https://bittrex.com
https://poloniex.com
https://www.bitstamp.net
https://www.kraken.com

There you have a list of reputable ones that I know.
If you are new to the bitcoin price speculation I suggest not to invest more than what you can afford to lose at least til you completely understand what you doing.