Returning lowest value out of x values

[Stoop]

Hi,

I am trying to gauge what kind of underwater drawdowns (drawdowns on open positions, or drawdown on unrealized profit/loss) I may experience while running my strategy. For this I have made an indicator and an output to Excel, this seems to be working fine. What I need help with, is figuring out how I can return the lowest value out of x number of values.

Basically what I see on my underwater drawdown 'indicator' is a string of numbers like this:
0, -2,-5,-9, -21, 0. The numbers representing the entry of a position and how it currently moves against me. Now what I need is to somehow return the lowest value out of those values.

This is currently how my underwater drawdown code looks like:

// Underwater Drawdown
                                UDD = 0; // Underwater drawdown
				// Long Underwater Drawdown
			if (Position.MarketPosition == MarketPosition.Long){
				if (Open[BarsSinceEntry()] > GetCurrentAsk())
				UDD = GetCurrentAsk() - Open[BarsSinceEntry()];
				else
				UDD = 0;}
				// Short Underwater Drawdown
			if (Position.MarketPosition == MarketPosition.Short){
				if (Open[BarsSinceEntry()] < GetCurrentBid())
				UDD = Open[BarsSinceEntry()] - GetCurrentBid();
				else 
				UDD = 0;}

I have thought of placing the values into an array and then return the lowest value from there, however, I didn't get it to work. Anyone have any ideas on how I can do this?

[NinjaTrader_JC]

Hello Stoop,

You may use the MIN() method that will return the lowest value over a specified period from a Data Series.

Let us know if we can be of further assistance.

[koganam]

Hi,

I am trying to gauge what kind of underwater drawdowns (drawdowns on open positions, or drawdown on unrealized profit/loss) I may experience while running my strategy. For this I have made an indicator and an output to Excel, this seems to be working fine. What I need help with, is figuring out how I can return the lowest value out of x number of values.

Basically what I see on my underwater drawdown 'indicator' is a string of numbers like this:
0, -2,-5,-9, -21, 0. The numbers representing the entry of a position and how it currently moves against me. Now what I need is to somehow return the lowest value out of those values.

This is currently how my underwater drawdown code looks like:

// Underwater Drawdown
                                UDD = 0; // Underwater drawdown
                // Long Underwater Drawdown
            if (Position.MarketPosition == MarketPosition.Long){
                if (Open[BarsSinceEntry()] > GetCurrentAsk())
                UDD = GetCurrentAsk() - Open[BarsSinceEntry()];
                else
                UDD = 0;}
                // Short Underwater Drawdown
            if (Position.MarketPosition == MarketPosition.Short){
                if (Open[BarsSinceEntry()] < GetCurrentBid())
                UDD = Open[BarsSinceEntry()] - GetCurrentBid();
                else 
                UDD = 0;}

I have thought of placing the values into an array and then return the lowest value from there, however, I didn't get it to work. Anyone have any ideas on how I can do this?

Make UDD a class variable, so that it will persist over updates, then use:

 
UDD = Math.Min(UDD, GetCurrentAsk() - Open[BarsSinceEntry()]);

for longs, and

 
UDD = Math.Min(UDD, Open[BarsSinceEntry()] - GetCurrentBid());

for shorts.

[Stoop]

Thanks a lot, that's very helpful. How would I make UDD into a class variable? I tried
following tutorials about class variables, but I can't seem to get it to work. Just some pointers would be really nice.

[koganam]

Thanks a lot, that's very helpful. How would I make UDD into a class variable? I tried
following tutorials about class variables, but I can't seem to get it to work. Just some pointers would be really nice.

Simplest way is to add it to the Variables section, following the format. In this case,

 
private double UDD = 0;

should do it.

[Stoop]

Oh, I see. I thought you wanted me to create a new class. I will get it working now then! Again, thanks a lot for your help, it's appreciated.