Wesr,
Many traders don't use Chi-x to include for gap fills ..I see it everyday a lot of gaps being left to come back and only get touched with chi-x .. Traders generally speaking will wait until it's closed properly with ASX ..
Each to there own I have chi-x on my platforms but prefer a proper gap fill..
JCS was undervalued and that gap I doubt will even get close not for awhile anyways..
