cet = (GMT+1)
21:00 p.m cet = 20.00 p.m GMT
03:00 a.m WIB (cet+6) = 03:00 a.m WIB (GMT+7)

TF: 30 minutes.
Trade time: 08:00 cet to 18:00 cet = 09:00 GMT to 19:00 GMT = 15.00 WIB to 02.00 WIB. 
	    14:00 to 00.00 WIB

Pairs to trade: EURUSD, USDCHF and GBPUSD. 

Use common sense and stop of 34 pips.