Time Relationships
Wave I= .5 * Wave II (+/-1 day)
Wave IV= .5*Wave III

Wave III = 161.8 *Wave I

Forecast
Using Wave I as a benchmark, Wave V would look to end between 17295 and 16620 or at 16000 (which is a nice round number and previous support) around the 7-14th of April which would be a tradeable buying opportunity.
Look for dying momentum to the downside, to pick a intermediate bottom.
Disclaimer: As with all TA, the better it looks the more likely to fail.