No Execution Risk
When you trade strategies via tailor-made combinations, all included instruments in the specified strategy are executed simultaneously on a net price and without execution risk.
Price
The price for the order should be stated as a common net price or the premium times the ratio for the instrument to be bought minus the premium times the ratio for the instrument to be sold. The tick size is 0.01.
Instruments
A TMC can consist of up to four instruments within the same underlying of equity derivatives. The instruments in a TMC must have the same contract size (multiplier). Index futures are not valid instruments in a TMC. It is possible to have a relative ratio of up to 2:1 between the included instruments.