first post here on Seasoned Advice and I'm just after a wee bit of insight in to the elements of a chilli sauce.  I've been looking in to making chilli sauces at home, but am yet to give it a go - I'm a huge fan of chilli sauces and would really love to nail the flavours I like in a sauce of my own.  I've checked out countless recipes in search of the key elements of a chilli sauce and then stumbled upon this article that stated the 4 key ingredients were fresh chillies, acid, aromatics (carrots, onions, etc.), and salt.   My Questions  1) If these are the core ingredients, what role do they play in creating the sauce? (Chillies are obvious, but the acid and salt I'm curious about)  2) Are there any other core ingredients that go towards making a good sauce? 
rackandboneman has excellent suggestions. If I may add one more, I would suggest adding some fairly strong tastes to reduce the prominence of the orange. Some soy, garlic and honey would go a long way toward turning the orange into a passable teriyaki. 