The precise proportions depend on personal taste.
If the sauce is too thin, mix some corn flour and cold water and stir it into the sauce, which will thicken when it comes back to the boil.
Make sure you use the sweet soy sauce (kecap manis) rather than the salty one.
Use some dry sherry or Chinese rice wine to make the sauce.
Babi pangang refers to a variety of recipes for Indonesian grilled pork recipes, 'babi' meaning pig or pork, and 'pangang' meaning grilled or roasted in the Malay and Indonesian languages.