As chart shows there are some early signs of caution as we may see 17800 as a medium term top forming and may see5-8% correction but keep in mind 5% aslo means 900 points so support near to 16900-17000
Bharti moved down very fastly after a multiyear breakout but I think 580 is level to watch as it is is good support but if it breaks 550 is must to come but at these levels there is some buying opportunity for investors