Want opinion on collective2

Yes you can also do spreads on Collective2, like Gold and Silver spread for example. You can go to their forum and ask any question you like about the spread trading strategy you intend to use, they will give you all the details.

 

I,personally, don't see the option to trade spreads at limit price.
They have IBtoC2 that translates IB orders into c2 orders. Maybe that helps.

 

It only depends on your average winning percentage, period.

If you risk $1 to make $3 but you only win your bet 20% of the time you will lose in the long run.

On the other hand if you win 30% (or more) of the time you are set for life.

 

But how do you know that you risk $1 to make $3?

 

My stop is 30 pips, my take profit is 90 pips, what is my risk-reward ratio?

3 to 1.

Most traders will simply multiply the size of their stop by 3 to get their profit target.

 

But what if it never reaches 90 pips reward in all your setup trials.

 

Then you just backtested a losing trading system.

 

Why to call it 3:1 reward to risk ratio if the reward was never there?

 

You are turning the problem (or the solution) upside down.

You backtest trading system X and the test reveals that a 3 to 1 risk reward ratio is the optimal value for system X, so you choose your take profit accordingly. For example if your stop is 15 pips on trade #502 then your take profit is 45 pips and so on.

Most traders do the reverse, they don't backtest their system but still believe that a 3 to 1 risk/reward ratio will automatically make them money in the long run, like if a 3 to 1 ratio has some kind of magical power just by itself.

 

I think 3x means profit factor as defined on collective2, not risk/reward ratio as you defined it. Then it makes sense.