Can any one tell me how to avoid that big gap? Execution price are very different from market price!
Thanks in advance!
You have to take into account the fact that binary.com provide maximum one price per second, and that when you buy an option, they use the NEXT price as the execution price. In other words, you will have to anticipate the next second's movement.
There is no way around this.
Is there a way to let the binary.com platform place a particular trade only when the market value is lower (or higher) than a certain price?
Short-term CALLs and PUTs don't let you fix the entry price. I believe you can fix the entry price by specifying a barrier for some longer-term contracts.