Broker one-click buy/sell prices different from market ticks

[pwned]

Hi, 

If I examine the prices on one-click buy/sell buttons, I see different numbers than the current tick price feed.

This is because I opened a particular account with fixed spread in order to make automation easier.

For a particular automated strategy, I need to use the one-click buy/sell prices provided by my broker, not the tick data. 

How can I access those values from inside an expert advisor?

I tried Ask and Bid variables, but they show the current market ask/bid prices, not the broker's one-click buy/sell prices. 

[William Roeder]

nurettin: show the current market ask/bid prices, not the broker's one-click buy/sell prices.	This are no differences. You only get brokers prices..

[Viktoria Sudraba]

Yes, this is possible. Previously discussed here and here.

The broker that I am currently testing has wide spread in:

• New Order Window
• Quick Trade Panel
• Market Watch Panel
• SymbolInforTick()
• SymbolInfoDouble()
• Actual trades executed in Demo account (haven't tried Live with them)

And they have narrow spread in:

• The Charts
• Market Depth Panel
• Symbols/Ticks History
• CopyTicks() and CopyTicksRange()

Here is a code snippet to quickly eyeball if the difference between the wide spread and narrow spread is a constant (it isn't in my case):

void OnTick()
{
  long digits = SymbolInfoInteger(_Symbol, SYMBOL_DIGITS);

  MqlTick last_tick = {};
  SymbolInfoTick(_Symbol, last_tick);

  MqlTick ticks[];
  datetime current_time = TimeCurrent();
  ulong now = current_time * 1000;
  ulong earlier = now - 100000;

  int result = CopyTicksRange(_Symbol, ticks, COPY_TICKS_ALL, earlier, now);
  int ticks_count = ArraySize(ticks);

  Print("Bid is:");
  Print(last_tick.bid + " in order window");
  Print(ticks[ticks_count - 1].bid + " on the chart");
  double diff = ticks[ticks_count - 1].bid - last_tick.bid;
  Print("Difference: " + DoubleToString(NormalizeDouble(diff, digits), digits));

  Print("Ask is:");
  Print(last_tick.ask + " in order window");
  Print(ticks[ticks_count - 1].ask + " on the chart");
  diff = last_tick.ask - ticks[ticks_count - 1].ask;
  Print("Difference: " + DoubleToString(NormalizeDouble(diff, digits), digits));
}