Does anyone know how I can set a random variable?

I'm trying to simulate a coin toss, so if variable = true, then buy, and if variable = false, then sell.

I would imagine MathSrand and MathRand is used, but how?

See the mq4 doc about MathSRand(), it is used to initiate the pseudo-random serie generated by MathRand().
MathRand() return a number integer between 0 and 32767. So you can decide that if(MathRan() > 16383.5) buy else sell

Look at MathRand and MathMod. Your looking for odd or even numbers. Not too difficult.

Lux

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Random number generation will work just fine, but you can do it with time as well.

if (CurrentTime() % 2 == 0)
openLong;
else
openShort;

Instead of CurrentTime(), you could also use Seconds() or really anything that returns the same number of odd as even values (I'm counting zero as an even value here).

-MRE-

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