How are the indicator and okey decided?
In okey a tile is flipped from the stack at the start: this is the indicator. That hand's okey (joker) is the tile one above the indicator, in the same colour. For example, if the indicator is the red 5, the okey is the red 6. If the indicator is 13, the okey is the 1 of the same colour (it wraps). The okey acts as a wildcard for any tile; the two blank false okeys take on the value of that okey tile.