As predicted Joker had a heavy fall on Monday as collections were around 65% down from Friday. The Monday collections will be in the 1.50-1.75 crore nett region and it was a similar fall across India.

The fall was expected as the film did not trend well on the weekend which was a must as its target audience was mainly families and kids.
Joker has grossed around 16.50 crore nett in four days and the week will be around 20 crore nett at best. 
The film will have the second lowest collections for an Akshay Kumar starrer in the last 5-6 years. The lowest being Tasveer 8x10. 

4 & 8 together creates disaster.
Joker adds to 17 which adds to 8.
Film releasing on 31st(4) Aug.
Compound no. of release date 31/8/2012 also adds to 8.
Combination of 4 & 8 together will kill the film & it will be monumental disaster.
Moreover Producer Writer Director Shirish Kunder is no.6( May 24, 1973) running in his unlucky 40th(4) year.
He will get lot of backlash.