pi bridge and amibroker for stock screening

if I use pi bridge the shall I have to pay extra(excluding rs 500) for amibroker? after using pi bridge can I put my own strategy with heikenashi chart with hull moving average for generate buy/sell signal for multiple stocks or scan the stocks which fullfill my condition for buy or sell?

Yes. Monthly charges are applicable.

Yes, You need to develop the Strategies on Amibroker and pass the orders to pi to be executed for semi-automation. Multiple orders are supported across the bridge.