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I'm an Intra Trader I sell and buy the waves over and over...
Good advice though...
I just closed my SHORT SELL positions from last night and now reopened some SHORT SELLS with STOPS. While playing poker on pokerstars lol

Are you shorting BTC against USD?

Are you shorting Alts agains BTC or USD?

Im shorting Bitcoin Cash and RIPPLE against USD
but they could be about to regain, my STOPS will get me out if they do

Good strategy. I have a hard time shorting any cryptocurrency for some reason - usually only do long sales. I have had problems with the strategy of setting high/low bids because it seems like the coins end up going way past my sell orders or way below my buy orders.

I’m with @money-dreamer. I have an ethical dilemma against shorting due to the nature of selling someone something and placing a bet that it will soon decrease in value.

It's not an ethical dilemma for me. It's the same as going long - buying something and placing a bet that it will soon increase in value. How is shorting worse than going long? It just feels unnatural to me.

Another way to look at it, if you are shorting Bitcoin against USD, then your are going long on USD against Bitcoin and vice versa so it is essentially the same ethical barrier to break either way.

@money-dreamer the difference between going long and short selling (in any type of investing) is that in a long position the seller receives the current present value of an investment and no longer has a vested interest in the transaction. Shorting an investment is similar to selling a lemon of a car, where the seller not only maintains a vested interest in the transaction, but naturally believes that the buyer is overpaying for the investment to the point where, by definition, the seller is wagering that the buyer has purchased an investment of diminishing value.
Putting a face to every transaction, going long is a vote of confidence in something/someone’s future via influx of capital. Shorting is a bet against someone’s success.

Which exchange do you use to be able to short crypto?

Poloniex works. Other ones include Bitfinex (depending on location). Or, Bitshares offers a decentralized exchange that allows for margin trading.

Edit: well, short one crypto versus another.

sorry for late reply, I use a few sites.
You might be able to use them depending on your location
markets.com trade.com plus500.com
They are actually for REAL MARKET TRADING but also have CRYPTO SECTION
you cant trade all cryptos but you do have enough choice to make cash from them